/*
 * Copyright (c) 2013-14 Mikko Mononen memon@inside.org
 *
 * This software is provided 'as-is', without any express or implied
 * warranty.  In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software
 * in a product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 * 3. This notice may not be removed or altered from any source distribution.
 *
 * The SVG parser is based on Anti-Grain Geometry 2.4 SVG example
 * Copyright (C) 2002-2004 Maxim Shemanarev (McSeem) (http://www.antigrain.com/)
 *
 * Arc calculation code based on canvg (https://code.google.com/p/canvg/)
 *
 * Bounding box calculation based on http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html
 *
 */

#ifndef NANOSVG_H
#define NANOSVG_H

#ifdef __cplusplus
extern "C" {
#endif

// NanoSVG is a simple stupid single-header-file SVG parse. The output of the parser is a list of cubic bezier shapes.
//
// The library suits well for anything from rendering scalable icons in your editor application to prototyping a game.
//
// NanoSVG supports a wide range of SVG features, but something may be missing, feel free to create a pull request!
//
// The shapes in the SVG images are transformed by the viewBox and converted to specified units.
// That is, you should get the same looking data as your designed in your favorite app.
//
// NanoSVG can return the paths in few different units. For example if you want to render an image, you may choose
// to get the paths in pixels, or if you are feeding the data into a CNC-cutter, you may want to use millimeters.
//
// The units passed to NanoVG should be one of: 'px', 'pt', 'pc' 'mm', 'cm', or 'in'.
// DPI (dots-per-inch) controls how the unit conversion is done.
//
// If you don't know or care about the units stuff, "px" and 96 should get you going.

/* Example Usage:
    // Load
    NSVGImage* image;
    image = nsvgParseFromFile("test.svg", "px", 96);
    printf("size: %f x %f\n", image->width, image->height);
    // Use...
    for (NSVGshape *shape = image->shapes; shape != NULL; shape = shape->next) {
        for (NSVGpath *path = shape->paths; path != NULL; path = path->next) {
            for (int i = 0; i < path->npts-1; i += 3) {
                float* p = &path->pts[i*2];
                drawCubicBez(p[0],p[1], p[2],p[3], p[4],p[5], p[6],p[7]);
            }
        }
    }
    // Delete
    nsvgDelete(image);
*/

enum NSVGpaintType {
    NSVG_PAINT_NONE            = 0,
    NSVG_PAINT_COLOR           = 1,
    NSVG_PAINT_LINEAR_GRADIENT = 2,
    NSVG_PAINT_RADIAL_GRADIENT = 3
};

enum NSVGspreadType { NSVG_SPREAD_PAD = 0, NSVG_SPREAD_REFLECT = 1, NSVG_SPREAD_REPEAT = 2 };

enum NSVGlineJoin { NSVG_JOIN_MITER = 0, NSVG_JOIN_ROUND = 1, NSVG_JOIN_BEVEL = 2 };

enum NSVGlineCap { NSVG_CAP_BUTT = 0, NSVG_CAP_ROUND = 1, NSVG_CAP_SQUARE = 2 };

enum NSVGfillRule { NSVG_FILLRULE_NONZERO = 0, NSVG_FILLRULE_EVENODD = 1 };

enum NSVGflags { NSVG_FLAGS_VISIBLE = 0x01 };

typedef struct NSVGgradientStop {
    unsigned int color;
    float        offset;
} NSVGgradientStop;

typedef struct NSVGgradient {
    float            xform[6];
    char             spread;
    float            fx, fy;
    int              nstops;
    NSVGgradientStop stops[1];
} NSVGgradient;

typedef struct NSVGpaint {
    char type;
    union {
        unsigned int  color;
        NSVGgradient *gradient;
    };
} NSVGpaint;

typedef struct NSVGpath {
    float           *pts;       // Cubic bezier points: x0,y0, [cpx1,cpx1,cpx2,cpy2,x1,y1], ...
    int              npts;      // Total number of bezier points.
    char             closed;    // Flag indicating if shapes should be treated as closed.
    float            bounds[4]; // Tight bounding box of the shape [minx,miny,maxx,maxy].
    struct NSVGpath *next;      // Pointer to next path, or NULL if last element.
} NSVGpath;

typedef struct NSVGshape {
    char              id[64];             // Optional 'id' attr of the shape or its group
    NSVGpaint         fill;               // Fill paint
    NSVGpaint         stroke;             // Stroke paint
    float             opacity;            // Opacity of the shape.
    float             strokeWidth;        // Stroke width (scaled).
    float             strokeDashOffset;   // Stroke dash offset (scaled).
    float             strokeDashArray[8]; // Stroke dash array (scaled).
    char              strokeDashCount;    // Number of dash values in dash array.
    char              strokeLineJoin;     // Stroke join type.
    char              strokeLineCap;      // Stroke cap type.
    float             miterLimit;         // Miter limit
    char              fillRule;           // Fill rule, see NSVGfillRule.
    unsigned char     flags;              // Logical or of NSVG_FLAGS_* flags
    float             bounds[4];          // Tight bounding box of the shape [minx,miny,maxx,maxy].
    NSVGpath         *paths;              // Linked list of paths in the image.
    struct NSVGshape *next;               // Pointer to next shape, or NULL if last element.
} NSVGshape;

typedef struct NSVGimage {
    float      width;  // Width of the image.
    float      height; // Height of the image.
    NSVGshape *shapes; // Linked list of shapes in the image.
} NSVGimage;

// Parses SVG file from a file, returns SVG image as paths.
NSVGimage *nsvgParseFromFile(const char *filename, const char *units, float dpi);

// Parses SVG file from a null terminated string, returns SVG image as paths.
// Important note: changes the string.
NSVGimage *nsvgParse(char *input, const char *units, float dpi);

// Deletes list of paths.
void nsvgDelete(NSVGimage *image);

#ifdef __cplusplus
}
#endif

#endif // NANOSVG_H

#ifdef NANOSVG_IMPLEMENTATION

#include <string.h>
#include <stdlib.h>
#include <math.h>

#define NSVG_PI          (3.14159265358979323846264338327f)
#define NSVG_KAPPA90     (0.5522847493f) // Length proportional to radius of a cubic bezier handle for 90deg arcs.

#define NSVG_ALIGN_MIN   0
#define NSVG_ALIGN_MID   1
#define NSVG_ALIGN_MAX   2
#define NSVG_ALIGN_NONE  0
#define NSVG_ALIGN_MEET  1
#define NSVG_ALIGN_SLICE 2

#define NSVG_NOTUSED(v)                                                                                                \
    do {                                                                                                               \
        (void)(1 ? (void)0 : ((void)(v)));                                                                             \
    } while (0)
#define NSVG_RGB(r, g, b) (((unsigned int)r) | ((unsigned int)g << 8) | ((unsigned int)b << 16))

#ifdef _MSC_VER
#pragma warning(disable : 4996) // Switch off security warnings
#pragma warning(disable : 4100) // Switch off unreferenced formal parameter warnings
#ifdef __cplusplus
#define NSVG_INLINE inline
#else
#define NSVG_INLINE
#endif
#else
#define NSVG_INLINE inline
#endif

static int nsvg__isspace(char c) { return strchr(" \t\n\v\f\r", c) != 0; }

static int nsvg__isdigit(char c) { return c >= '0' && c <= '9'; }

static int nsvg__isnum(char c) { return strchr("0123456789+-.eE", c) != 0; }

static NSVG_INLINE float nsvg__minf(float a, float b) { return a < b ? a : b; }
static NSVG_INLINE float nsvg__maxf(float a, float b) { return a > b ? a : b; }

// Simple XML parser

#define NSVG_XML_TAG         1
#define NSVG_XML_CONTENT     2
#define NSVG_XML_MAX_ATTRIBS 256

static void nsvg__parseContent(char *s, void (*contentCb)(void *ud, const char *s), void *ud) {
    // Trim start white spaces
    while (*s && nsvg__isspace(*s))
        s++;
    if (!*s)
        return;

    if (contentCb)
        (*contentCb)(ud, s);
}

static void nsvg__parseElement(char *s, void (*startelCb)(void *ud, const char *el, const char **attr),
                               void (*endelCb)(void *ud, const char *el), void *ud) {
    const char *attr[NSVG_XML_MAX_ATTRIBS];
    int         nattr = 0;
    char       *name;
    int         start = 0;
    int         end   = 0;
    char        quote;

    // Skip white space after the '<'
    while (*s && nsvg__isspace(*s))
        s++;

    // Check if the tag is end tag
    if (*s == '/') {
        s++;
        end = 1;
    } else {
        start = 1;
    }

    // Skip comments, data and preprocessor stuff.
    if (!*s || *s == '?' || *s == '!')
        return;

    // Get tag name
    name = s;
    while (*s && !nsvg__isspace(*s))
        s++;
    if (*s) {
        *s++ = '\0';
    }

    // Get attribs
    while (!end && *s && nattr < NSVG_XML_MAX_ATTRIBS - 3) {
        char *name  = NULL;
        char *value = NULL;

        // Skip white space before the attrib name
        while (*s && nsvg__isspace(*s))
            s++;
        if (!*s)
            break;
        if (*s == '/') {
            end = 1;
            break;
        }
        name = s;
        // Find end of the attrib name.
        while (*s && !nsvg__isspace(*s) && *s != '=')
            s++;
        if (*s) {
            *s++ = '\0';
        }
        // Skip until the beginning of the value.
        while (*s && *s != '\"' && *s != '\'')
            s++;
        if (!*s)
            break;
        quote = *s;
        s++;
        // Store value and find the end of it.
        value = s;
        while (*s && *s != quote)
            s++;
        if (*s) {
            *s++ = '\0';
        }

        // Store only well formed attributes
        if (name && value) {
            attr[nattr++] = name;
            attr[nattr++] = value;
        }
    }

    // List terminator
    attr[nattr++] = 0;
    attr[nattr++] = 0;

    // Call callbacks.
    if (start && startelCb)
        (*startelCb)(ud, name, attr);
    if (end && endelCb)
        (*endelCb)(ud, name);
}

int nsvg__parseXML(char *input, void (*startelCb)(void *ud, const char *el, const char **attr),
                   void (*endelCb)(void *ud, const char *el), void (*contentCb)(void *ud, const char *s), void *ud) {
    char *s     = input;
    char *mark  = s;
    int   state = NSVG_XML_CONTENT;
    while (*s) {
        if (*s == '<' && state == NSVG_XML_CONTENT) {
            // Start of a tag
            *s++ = '\0';
            nsvg__parseContent(mark, contentCb, ud);
            mark  = s;
            state = NSVG_XML_TAG;
        } else if (*s == '>' && state == NSVG_XML_TAG) {
            // Start of a content or new tag.
            *s++ = '\0';
            nsvg__parseElement(mark, startelCb, endelCb, ud);
            mark  = s;
            state = NSVG_XML_CONTENT;
        } else {
            s++;
        }
    }

    return 1;
}

/* Simple SVG parser. */

#define NSVG_MAX_ATTR 128

enum NSVGgradientUnits { NSVG_USER_SPACE = 0, NSVG_OBJECT_SPACE = 1 };

#define NSVG_MAX_DASHES 8

enum NSVGunits {
    NSVG_UNITS_USER,
    NSVG_UNITS_PX,
    NSVG_UNITS_PT,
    NSVG_UNITS_PC,
    NSVG_UNITS_MM,
    NSVG_UNITS_CM,
    NSVG_UNITS_IN,
    NSVG_UNITS_PERCENT,
    NSVG_UNITS_EM,
    NSVG_UNITS_EX
};

typedef struct NSVGcoordinate {
    float value;
    int   units;
} NSVGcoordinate;

typedef struct NSVGlinearData {
    NSVGcoordinate x1, y1, x2, y2;
} NSVGlinearData;

typedef struct NSVGradialData {
    NSVGcoordinate cx, cy, r, fx, fy;
} NSVGradialData;

typedef struct NSVGgradientData {
    char id[64];
    char ref[64];
    char type;
    union {
        NSVGlinearData linear;
        NSVGradialData radial;
    };
    char                     spread;
    char                     units;
    float                    xform[6];
    int                      nstops;
    NSVGgradientStop        *stops;
    struct NSVGgradientData *next;
} NSVGgradientData;

typedef struct NSVGattrib {
    char         id[64];
    float        xform[6];
    unsigned int fillColor;
    unsigned int strokeColor;
    float        opacity;
    float        fillOpacity;
    float        strokeOpacity;
    char         fillGradient[64];
    char         strokeGradient[64];
    float        strokeWidth;
    float        strokeDashOffset;
    float        strokeDashArray[NSVG_MAX_DASHES];
    int          strokeDashCount;
    char         strokeLineJoin;
    char         strokeLineCap;
    float        miterLimit;
    char         fillRule;
    float        fontSize;
    unsigned int stopColor;
    float        stopOpacity;
    float        stopOffset;
    char         hasFill;
    char         hasStroke;
    char         visible;
} NSVGattrib;

typedef struct NSVGparser {
    NSVGattrib        attr[NSVG_MAX_ATTR];
    int               attrHead;
    float            *pts;
    int               npts;
    int               cpts;
    NSVGpath         *plist;
    NSVGimage        *image;
    NSVGgradientData *gradients;
    NSVGshape        *shapesTail;
    float             viewMinx, viewMiny, viewWidth, viewHeight;
    int               alignX, alignY, alignType;
    float             dpi;
    char              pathFlag;
    char              defsFlag;
} NSVGparser;

static void nsvg__xformIdentity(float *t) {
    t[0] = 1.0f;
    t[1] = 0.0f;
    t[2] = 0.0f;
    t[3] = 1.0f;
    t[4] = 0.0f;
    t[5] = 0.0f;
}

static void nsvg__xformSetTranslation(float *t, float tx, float ty) {
    t[0] = 1.0f;
    t[1] = 0.0f;
    t[2] = 0.0f;
    t[3] = 1.0f;
    t[4] = tx;
    t[5] = ty;
}

static void nsvg__xformSetScale(float *t, float sx, float sy) {
    t[0] = sx;
    t[1] = 0.0f;
    t[2] = 0.0f;
    t[3] = sy;
    t[4] = 0.0f;
    t[5] = 0.0f;
}

static void nsvg__xformSetSkewX(float *t, float a) {
    t[0] = 1.0f;
    t[1] = 0.0f;
    t[2] = tanf(a);
    t[3] = 1.0f;
    t[4] = 0.0f;
    t[5] = 0.0f;
}

static void nsvg__xformSetSkewY(float *t, float a) {
    t[0] = 1.0f;
    t[1] = tanf(a);
    t[2] = 0.0f;
    t[3] = 1.0f;
    t[4] = 0.0f;
    t[5] = 0.0f;
}

static void nsvg__xformSetRotation(float *t, float a) {
    float cs = cosf(a), sn = sinf(a);
    t[0] = cs;
    t[1] = sn;
    t[2] = -sn;
    t[3] = cs;
    t[4] = 0.0f;
    t[5] = 0.0f;
}

static void nsvg__xformMultiply(float *t, float *s) {
    float t0 = t[0] * s[0] + t[1] * s[2];
    float t2 = t[2] * s[0] + t[3] * s[2];
    float t4 = t[4] * s[0] + t[5] * s[2] + s[4];
    t[1]     = t[0] * s[1] + t[1] * s[3];
    t[3]     = t[2] * s[1] + t[3] * s[3];
    t[5]     = t[4] * s[1] + t[5] * s[3] + s[5];
    t[0]     = t0;
    t[2]     = t2;
    t[4]     = t4;
}

static void nsvg__xformInverse(float *inv, float *t) {
    double invdet, det = (double)t[0] * t[3] - (double)t[2] * t[1];
    if (det > -1e-6 && det < 1e-6) {
        nsvg__xformIdentity(t);
        return;
    }
    invdet = 1.0 / det;
    inv[0] = (float)(t[3] * invdet);
    inv[2] = (float)(-t[2] * invdet);
    inv[4] = (float)(((double)t[2] * t[5] - (double)t[3] * t[4]) * invdet);
    inv[1] = (float)(-t[1] * invdet);
    inv[3] = (float)(t[0] * invdet);
    inv[5] = (float)(((double)t[1] * t[4] - (double)t[0] * t[5]) * invdet);
}

static void nsvg__xformPremultiply(float *t, float *s) {
    float s2[6];
    memcpy(s2, s, sizeof(float) * 6);
    nsvg__xformMultiply(s2, t);
    memcpy(t, s2, sizeof(float) * 6);
}

static void nsvg__xformPoint(float *dx, float *dy, float x, float y, float *t) {
    *dx = x * t[0] + y * t[2] + t[4];
    *dy = x * t[1] + y * t[3] + t[5];
}

static void nsvg__xformVec(float *dx, float *dy, float x, float y, float *t) {
    *dx = x * t[0] + y * t[2];
    *dy = x * t[1] + y * t[3];
}

#define NSVG_EPSILON (1e-12)

static int nsvg__ptInBounds(float *pt, float *bounds) {
    return pt[0] >= bounds[0] && pt[0] <= bounds[2] && pt[1] >= bounds[1] && pt[1] <= bounds[3];
}

static double nsvg__evalBezier(double t, double p0, double p1, double p2, double p3) {
    double it = 1.0 - t;
    return it * it * it * p0 + 3.0 * it * it * t * p1 + 3.0 * it * t * t * p2 + t * t * t * p3;
}

static void nsvg__curveBounds(float *bounds, float *curve) {
    int    i, j, count;
    double roots[2], a, b, c, b2ac, t, v;
    float *v0 = &curve[0];
    float *v1 = &curve[2];
    float *v2 = &curve[4];
    float *v3 = &curve[6];

    // Start the bounding box by end points
    bounds[0] = nsvg__minf(v0[0], v3[0]);
    bounds[1] = nsvg__minf(v0[1], v3[1]);
    bounds[2] = nsvg__maxf(v0[0], v3[0]);
    bounds[3] = nsvg__maxf(v0[1], v3[1]);

    // Bezier curve fits inside the convex hull of it's control points.
    // If control points are inside the bounds, we're done.
    if (nsvg__ptInBounds(v1, bounds) && nsvg__ptInBounds(v2, bounds))
        return;

    // Add bezier curve inflection points in X and Y.
    for (i = 0; i < 2; i++) {
        a     = -3.0 * v0[i] + 9.0 * v1[i] - 9.0 * v2[i] + 3.0 * v3[i];
        b     = 6.0 * v0[i] - 12.0 * v1[i] + 6.0 * v2[i];
        c     = 3.0 * v1[i] - 3.0 * v0[i];
        count = 0;
        if (fabs(a) < NSVG_EPSILON) {
            if (fabs(b) > NSVG_EPSILON) {
                t = -c / b;
                if (t > NSVG_EPSILON && t < 1.0 - NSVG_EPSILON)
                    roots[count++] = t;
            }
        } else {
            b2ac = b * b - 4.0 * c * a;
            if (b2ac > NSVG_EPSILON) {
                t = (-b + sqrt(b2ac)) / (2.0 * a);
                if (t > NSVG_EPSILON && t < 1.0 - NSVG_EPSILON)
                    roots[count++] = t;
                t = (-b - sqrt(b2ac)) / (2.0 * a);
                if (t > NSVG_EPSILON && t < 1.0 - NSVG_EPSILON)
                    roots[count++] = t;
            }
        }
        for (j = 0; j < count; j++) {
            v             = nsvg__evalBezier(roots[j], v0[i], v1[i], v2[i], v3[i]);
            bounds[0 + i] = nsvg__minf(bounds[0 + i], (float)v);
            bounds[2 + i] = nsvg__maxf(bounds[2 + i], (float)v);
        }
    }
}

static NSVGparser *nsvg__createParser() {
    NSVGparser *p;
    p = (NSVGparser *)malloc(sizeof(NSVGparser));
    if (p == NULL)
        goto error;
    memset(p, 0, sizeof(NSVGparser));

    p->image = (NSVGimage *)malloc(sizeof(NSVGimage));
    if (p->image == NULL)
        goto error;
    memset(p->image, 0, sizeof(NSVGimage));

    // Init style
    nsvg__xformIdentity(p->attr[0].xform);
    memset(p->attr[0].id, 0, sizeof p->attr[0].id);
    p->attr[0].fillColor      = NSVG_RGB(0, 0, 0);
    p->attr[0].strokeColor    = NSVG_RGB(0, 0, 0);
    p->attr[0].opacity        = 1;
    p->attr[0].fillOpacity    = 1;
    p->attr[0].strokeOpacity  = 1;
    p->attr[0].stopOpacity    = 1;
    p->attr[0].strokeWidth    = 1;
    p->attr[0].strokeLineJoin = NSVG_JOIN_MITER;
    p->attr[0].strokeLineCap  = NSVG_CAP_BUTT;
    p->attr[0].miterLimit     = 4;
    p->attr[0].fillRule       = NSVG_FILLRULE_NONZERO;
    p->attr[0].hasFill        = 1;
    p->attr[0].visible        = 1;

    return p;

error:
    if (p) {
        if (p->image)
            free(p->image);
        free(p);
    }
    return NULL;
}

static void nsvg__deletePaths(NSVGpath *path) {
    while (path) {
        NSVGpath *next = path->next;
        if (path->pts != NULL)
            free(path->pts);
        free(path);
        path = next;
    }
}

static void nsvg__deletePaint(NSVGpaint *paint) {
    if (paint->type == NSVG_PAINT_LINEAR_GRADIENT || paint->type == NSVG_PAINT_RADIAL_GRADIENT)
        free(paint->gradient);
}

static void nsvg__deleteGradientData(NSVGgradientData *grad) {
    NSVGgradientData *next;
    while (grad != NULL) {
        next = grad->next;
        free(grad->stops);
        free(grad);
        grad = next;
    }
}

static void nsvg__deleteParser(NSVGparser *p) {
    if (p != NULL) {
        nsvg__deletePaths(p->plist);
        nsvg__deleteGradientData(p->gradients);
        nsvgDelete(p->image);
        free(p->pts);
        free(p);
    }
}

static void nsvg__resetPath(NSVGparser *p) { p->npts = 0; }

static void nsvg__addPoint(NSVGparser *p, float x, float y) {
    if (p->npts + 1 > p->cpts) {
        p->cpts = p->cpts ? p->cpts * 2 : 8;
        p->pts  = (float *)realloc(p->pts, p->cpts * 2 * sizeof(float));
        if (!p->pts)
            return;
    }
    p->pts[p->npts * 2 + 0] = x;
    p->pts[p->npts * 2 + 1] = y;
    p->npts++;
}

static void nsvg__moveTo(NSVGparser *p, float x, float y) {
    if (p->npts > 0) {
        p->pts[(p->npts - 1) * 2 + 0] = x;
        p->pts[(p->npts - 1) * 2 + 1] = y;
    } else {
        nsvg__addPoint(p, x, y);
    }
}

static void nsvg__lineTo(NSVGparser *p, float x, float y) {
    float px, py, dx, dy;
    if (p->npts > 0) {
        px = p->pts[(p->npts - 1) * 2 + 0];
        py = p->pts[(p->npts - 1) * 2 + 1];
        dx = x - px;
        dy = y - py;
        nsvg__addPoint(p, px + dx / 3.0f, py + dy / 3.0f);
        nsvg__addPoint(p, x - dx / 3.0f, y - dy / 3.0f);
        nsvg__addPoint(p, x, y);
    }
}

static void nsvg__cubicBezTo(NSVGparser *p, float cpx1, float cpy1, float cpx2, float cpy2, float x, float y) {
    nsvg__addPoint(p, cpx1, cpy1);
    nsvg__addPoint(p, cpx2, cpy2);
    nsvg__addPoint(p, x, y);
}

static NSVGattrib *nsvg__getAttr(NSVGparser *p) { return &p->attr[p->attrHead]; }

static void nsvg__pushAttr(NSVGparser *p) {
    if (p->attrHead < NSVG_MAX_ATTR - 1) {
        p->attrHead++;
        memcpy(&p->attr[p->attrHead], &p->attr[p->attrHead - 1], sizeof(NSVGattrib));
    }
}

static void nsvg__popAttr(NSVGparser *p) {
    if (p->attrHead > 0)
        p->attrHead--;
}

static float nsvg__actualOrigX(NSVGparser *p) { return p->viewMinx; }

static float nsvg__actualOrigY(NSVGparser *p) { return p->viewMiny; }

static float nsvg__actualWidth(NSVGparser *p) { return p->viewWidth; }

static float nsvg__actualHeight(NSVGparser *p) { return p->viewHeight; }

static float nsvg__actualLength(NSVGparser *p) {
    float w = nsvg__actualWidth(p), h = nsvg__actualHeight(p);
    return sqrtf(w * w + h * h) / sqrtf(2.0f);
}

static float nsvg__convertToPixels(NSVGparser *p, NSVGcoordinate c, float orig, float length) {
    NSVGattrib *attr = nsvg__getAttr(p);
    switch (c.units) {
    case NSVG_UNITS_USER:
        return c.value;
    case NSVG_UNITS_PX:
        return c.value;
    case NSVG_UNITS_PT:
        return c.value / 72.0f * p->dpi;
    case NSVG_UNITS_PC:
        return c.value / 6.0f * p->dpi;
    case NSVG_UNITS_MM:
        return c.value / 25.4f * p->dpi;
    case NSVG_UNITS_CM:
        return c.value / 2.54f * p->dpi;
    case NSVG_UNITS_IN:
        return c.value * p->dpi;
    case NSVG_UNITS_EM:
        return c.value * attr->fontSize;
    case NSVG_UNITS_EX:
        return c.value * attr->fontSize * 0.52f; // x-height of Helvetica.
    case NSVG_UNITS_PERCENT:
        return orig + c.value / 100.0f * length;
    default:
        return c.value;
    }
    return c.value;
}

static NSVGgradientData *nsvg__findGradientData(NSVGparser *p, const char *id) {
    NSVGgradientData *grad = p->gradients;
    while (grad) {
        if (strcmp(grad->id, id) == 0)
            return grad;
        grad = grad->next;
    }
    return NULL;
}

static NSVGgradient *nsvg__createGradient(NSVGparser *p, const char *id, const float *localBounds, char *paintType) {
    NSVGattrib       *attr  = nsvg__getAttr(p);
    NSVGgradientData *data  = NULL;
    NSVGgradientData *ref   = NULL;
    NSVGgradientStop *stops = NULL;
    NSVGgradient     *grad;
    float             ox, oy, sw, sh, sl;
    int               nstops = 0;

    data = nsvg__findGradientData(p, id);
    if (data == NULL)
        return NULL;

    // TODO: use ref to fill in all unset values too.
    ref = data;
    while (ref != NULL) {
        if (stops == NULL && ref->stops != NULL) {
            stops  = ref->stops;
            nstops = ref->nstops;
            break;
        }
        ref = nsvg__findGradientData(p, ref->ref);
    }
    if (stops == NULL)
        return NULL;

    grad = (NSVGgradient *)malloc(sizeof(NSVGgradient) + sizeof(NSVGgradientStop) * (nstops - 1));
    if (grad == NULL)
        return NULL;

    // The shape width and height.
    if (data->units == NSVG_OBJECT_SPACE) {
        ox = localBounds[0];
        oy = localBounds[1];
        sw = localBounds[2] - localBounds[0];
        sh = localBounds[3] - localBounds[1];
    } else {
        ox = nsvg__actualOrigX(p);
        oy = nsvg__actualOrigY(p);
        sw = nsvg__actualWidth(p);
        sh = nsvg__actualHeight(p);
    }
    sl = sqrtf(sw * sw + sh * sh) / sqrtf(2.0f);

    if (data->type == NSVG_PAINT_LINEAR_GRADIENT) {
        float x1, y1, x2, y2, dx, dy;
        x1 = nsvg__convertToPixels(p, data->linear.x1, ox, sw);
        y1 = nsvg__convertToPixels(p, data->linear.y1, oy, sh);
        x2 = nsvg__convertToPixels(p, data->linear.x2, ox, sw);
        y2 = nsvg__convertToPixels(p, data->linear.y2, oy, sh);
        // Calculate transform aligned to the line
        dx             = x2 - x1;
        dy             = y2 - y1;
        grad->xform[0] = dy;
        grad->xform[1] = -dx;
        grad->xform[2] = dx;
        grad->xform[3] = dy;
        grad->xform[4] = x1;
        grad->xform[5] = y1;
    } else {
        float cx, cy, fx, fy, r;
        cx = nsvg__convertToPixels(p, data->radial.cx, ox, sw);
        cy = nsvg__convertToPixels(p, data->radial.cy, oy, sh);
        fx = nsvg__convertToPixels(p, data->radial.fx, ox, sw);
        fy = nsvg__convertToPixels(p, data->radial.fy, oy, sh);
        r  = nsvg__convertToPixels(p, data->radial.r, 0, sl);
        // Calculate transform aligned to the circle
        grad->xform[0] = r;
        grad->xform[1] = 0;
        grad->xform[2] = 0;
        grad->xform[3] = r;
        grad->xform[4] = cx;
        grad->xform[5] = cy;
        grad->fx       = fx / r;
        grad->fy       = fy / r;
    }

    nsvg__xformMultiply(grad->xform, data->xform);
    nsvg__xformMultiply(grad->xform, attr->xform);

    grad->spread = data->spread;
    memcpy(grad->stops, stops, nstops * sizeof(NSVGgradientStop));
    grad->nstops = nstops;

    *paintType = data->type;

    return grad;
}

static float nsvg__getAverageScale(float *t) {
    float sx = sqrtf(t[0] * t[0] + t[2] * t[2]);
    float sy = sqrtf(t[1] * t[1] + t[3] * t[3]);
    return (sx + sy) * 0.5f;
}

static void nsvg__getLocalBounds(float *bounds, NSVGshape *shape, float *xform) {
    NSVGpath *path;
    float     curve[4 * 2], curveBounds[4];
    int       i, first = 1;
    for (path = shape->paths; path != NULL; path = path->next) {
        nsvg__xformPoint(&curve[0], &curve[1], path->pts[0], path->pts[1], xform);
        for (i = 0; i < path->npts - 1; i += 3) {
            nsvg__xformPoint(&curve[2], &curve[3], path->pts[(i + 1) * 2], path->pts[(i + 1) * 2 + 1], xform);
            nsvg__xformPoint(&curve[4], &curve[5], path->pts[(i + 2) * 2], path->pts[(i + 2) * 2 + 1], xform);
            nsvg__xformPoint(&curve[6], &curve[7], path->pts[(i + 3) * 2], path->pts[(i + 3) * 2 + 1], xform);
            nsvg__curveBounds(curveBounds, curve);
            if (first) {
                bounds[0] = curveBounds[0];
                bounds[1] = curveBounds[1];
                bounds[2] = curveBounds[2];
                bounds[3] = curveBounds[3];
                first     = 0;
            } else {
                bounds[0] = nsvg__minf(bounds[0], curveBounds[0]);
                bounds[1] = nsvg__minf(bounds[1], curveBounds[1]);
                bounds[2] = nsvg__maxf(bounds[2], curveBounds[2]);
                bounds[3] = nsvg__maxf(bounds[3], curveBounds[3]);
            }
            curve[0] = curve[6];
            curve[1] = curve[7];
        }
    }
}

static void nsvg__addShape(NSVGparser *p) {
    NSVGattrib *attr  = nsvg__getAttr(p);
    float       scale = 1.0f;
    NSVGshape  *shape;
    NSVGpath   *path;
    int         i;

    if (p->plist == NULL)
        return;

    shape = (NSVGshape *)malloc(sizeof(NSVGshape));
    if (shape == NULL)
        goto error;
    memset(shape, 0, sizeof(NSVGshape));

    memcpy(shape->id, attr->id, sizeof shape->id);
    scale                   = nsvg__getAverageScale(attr->xform);
    shape->strokeWidth      = attr->strokeWidth * scale;
    shape->strokeDashOffset = attr->strokeDashOffset * scale;
    shape->strokeDashCount  = (char)attr->strokeDashCount;
    for (i = 0; i < attr->strokeDashCount; i++)
        shape->strokeDashArray[i] = attr->strokeDashArray[i] * scale;
    shape->strokeLineJoin = attr->strokeLineJoin;
    shape->strokeLineCap  = attr->strokeLineCap;
    shape->miterLimit     = attr->miterLimit;
    shape->fillRule       = attr->fillRule;
    shape->opacity        = attr->opacity;

    shape->paths = p->plist;
    p->plist     = NULL;

    // Calculate shape bounds
    shape->bounds[0] = shape->paths->bounds[0];
    shape->bounds[1] = shape->paths->bounds[1];
    shape->bounds[2] = shape->paths->bounds[2];
    shape->bounds[3] = shape->paths->bounds[3];
    for (path = shape->paths->next; path != NULL; path = path->next) {
        shape->bounds[0] = nsvg__minf(shape->bounds[0], path->bounds[0]);
        shape->bounds[1] = nsvg__minf(shape->bounds[1], path->bounds[1]);
        shape->bounds[2] = nsvg__maxf(shape->bounds[2], path->bounds[2]);
        shape->bounds[3] = nsvg__maxf(shape->bounds[3], path->bounds[3]);
    }

    // Set fill
    if (attr->hasFill == 0) {
        shape->fill.type = NSVG_PAINT_NONE;
    } else if (attr->hasFill == 1) {
        shape->fill.type  = NSVG_PAINT_COLOR;
        shape->fill.color = attr->fillColor;
        shape->fill.color |= (unsigned int)(attr->fillOpacity * 255) << 24;
    } else if (attr->hasFill == 2) {
        float inv[6], localBounds[4];
        nsvg__xformInverse(inv, attr->xform);
        nsvg__getLocalBounds(localBounds, shape, inv);
        shape->fill.gradient = nsvg__createGradient(p, attr->fillGradient, localBounds, &shape->fill.type);
        if (shape->fill.gradient == NULL) {
            shape->fill.type = NSVG_PAINT_NONE;
        }
    }

    // Set stroke
    if (attr->hasStroke == 0) {
        shape->stroke.type = NSVG_PAINT_NONE;
    } else if (attr->hasStroke == 1) {
        shape->stroke.type  = NSVG_PAINT_COLOR;
        shape->stroke.color = attr->strokeColor;
        shape->stroke.color |= (unsigned int)(attr->strokeOpacity * 255) << 24;
    } else if (attr->hasStroke == 2) {
        float inv[6], localBounds[4];
        nsvg__xformInverse(inv, attr->xform);
        nsvg__getLocalBounds(localBounds, shape, inv);
        shape->stroke.gradient = nsvg__createGradient(p, attr->strokeGradient, localBounds, &shape->stroke.type);
        if (shape->stroke.gradient == NULL)
            shape->stroke.type = NSVG_PAINT_NONE;
    }

    // Set flags
    shape->flags = (attr->visible ? NSVG_FLAGS_VISIBLE : 0x00);

    // Add to tail
    if (p->image->shapes == NULL)
        p->image->shapes = shape;
    else
        p->shapesTail->next = shape;
    p->shapesTail = shape;

    return;

error:
    if (shape)
        free(shape);
}

static void nsvg__addPath(NSVGparser *p, char closed) {
    NSVGattrib *attr = nsvg__getAttr(p);
    NSVGpath   *path = NULL;
    float       bounds[4];
    float      *curve;
    int         i;

    if (p->npts < 4)
        return;

    if (closed)
        nsvg__lineTo(p, p->pts[0], p->pts[1]);

    path = (NSVGpath *)malloc(sizeof(NSVGpath));
    if (path == NULL)
        goto error;
    memset(path, 0, sizeof(NSVGpath));

    path->pts = (float *)malloc(p->npts * 2 * sizeof(float));
    if (path->pts == NULL)
        goto error;
    path->closed = closed;
    path->npts   = p->npts;

    // Transform path.
    for (i = 0; i < p->npts; ++i)
        nsvg__xformPoint(&path->pts[i * 2], &path->pts[i * 2 + 1], p->pts[i * 2], p->pts[i * 2 + 1], attr->xform);

    // Find bounds
    for (i = 0; i < path->npts - 1; i += 3) {
        curve = &path->pts[i * 2];
        nsvg__curveBounds(bounds, curve);
        if (i == 0) {
            path->bounds[0] = bounds[0];
            path->bounds[1] = bounds[1];
            path->bounds[2] = bounds[2];
            path->bounds[3] = bounds[3];
        } else {
            path->bounds[0] = nsvg__minf(path->bounds[0], bounds[0]);
            path->bounds[1] = nsvg__minf(path->bounds[1], bounds[1]);
            path->bounds[2] = nsvg__maxf(path->bounds[2], bounds[2]);
            path->bounds[3] = nsvg__maxf(path->bounds[3], bounds[3]);
        }
    }

    path->next = p->plist;
    p->plist   = path;

    return;

error:
    if (path != NULL) {
        if (path->pts != NULL)
            free(path->pts);
        free(path);
    }
}

// We roll our own string to float because the std library one uses locale and messes things up.
static double nsvg__atof(const char *s) {
    char     *cur = (char *)s;
    char     *end = NULL;
    double    res = 0.0, sign = 1.0;
    long long intPart = 0, fracPart = 0;
    char      hasIntPart = 0, hasFracPart = 0;

    // Parse optional sign
    if (*cur == '+') {
        cur++;
    } else if (*cur == '-') {
        sign = -1;
        cur++;
    }

    // Parse integer part
    if (nsvg__isdigit(*cur)) {
        // Parse digit sequence
        intPart = (double)strtoll(cur, &end, 10);
        if (cur != end) {
            res        = (double)intPart;
            hasIntPart = 1;
            cur        = end;
        }
    }

    // Parse fractional part.
    if (*cur == '.') {
        cur++; // Skip '.'
        if (nsvg__isdigit(*cur)) {
            // Parse digit sequence
            fracPart = strtoll(cur, &end, 10);
            if (cur != end) {
                res += (double)fracPart / pow(10.0, (double)(end - cur));
                hasFracPart = 1;
                cur         = end;
            }
        }
    }

    // A valid number should have integer or fractional part.
    if (!hasIntPart && !hasFracPart)
        return 0.0;

    // Parse optional exponent
    if (*cur == 'e' || *cur == 'E') {
        int expPart = 0;
        cur++;                           // skip 'E'
        expPart = strtol(cur, &end, 10); // Parse digit sequence with sign
        if (cur != end) {
            res *= pow(10.0, (double)expPart);
        }
    }

    return res * sign;
}

static const char *nsvg__parseNumber(const char *s, char *it, const int size) {
    const int last = size - 1;
    int       i    = 0;

    // sign
    if (*s == '-' || *s == '+') {
        if (i < last)
            it[i++] = *s;
        s++;
    }
    // integer part
    while (*s && nsvg__isdigit(*s)) {
        if (i < last)
            it[i++] = *s;
        s++;
    }
    if (*s == '.') {
        // decimal point
        if (i < last)
            it[i++] = *s;
        s++;
        // fraction part
        while (*s && nsvg__isdigit(*s)) {
            if (i < last)
                it[i++] = *s;
            s++;
        }
    }
    // exponent
    if (*s == 'e' || *s == 'E') {
        if (i < last)
            it[i++] = *s;
        s++;
        if (*s == '-' || *s == '+') {
            if (i < last)
                it[i++] = *s;
            s++;
        }
        while (*s && nsvg__isdigit(*s)) {
            if (i < last)
                it[i++] = *s;
            s++;
        }
    }
    it[i] = '\0';

    return s;
}

static const char *nsvg__getNextPathItem(const char *s, char *it) {
    it[0] = '\0';
    // Skip white spaces and commas
    while (*s && (nsvg__isspace(*s) || *s == ','))
        s++;
    if (!*s)
        return s;
    if (*s == '-' || *s == '+' || *s == '.' || nsvg__isdigit(*s)) {
        s = nsvg__parseNumber(s, it, 64);
    } else {
        // Parse command
        it[0] = *s++;
        it[1] = '\0';
        return s;
    }

    return s;
}

static unsigned int nsvg__parseColorHex(const char *str) {
    unsigned int c = 0, r = 0, g = 0, b = 0;
    int          n = 0;
    str++; // skip #
    // Calculate number of characters.
    while (str[n] && !nsvg__isspace(str[n]))
        n++;
    if (n == 6) {
        sscanf(str, "%x", &c);
    } else if (n == 3) {
        sscanf(str, "%x", &c);
        c = (c & 0xf) | ((c & 0xf0) << 4) | ((c & 0xf00) << 8);
        c |= c << 4;
    }
    r = (c >> 16) & 0xff;
    g = (c >> 8) & 0xff;
    b = c & 0xff;
    return NSVG_RGB(r, g, b);
}

static unsigned int nsvg__parseColorRGB(const char *str) {
    int  r = -1, g = -1, b = -1;
    char s1[32] = "", s2[32] = "";
    sscanf(str + 4, "%d%[%%, \t]%d%[%%, \t]%d", &r, s1, &g, s2, &b);
    if (strchr(s1, '%')) {
        return NSVG_RGB((r * 255) / 100, (g * 255) / 100, (b * 255) / 100);
    } else {
        return NSVG_RGB(r, g, b);
    }
}

typedef struct NSVGNamedColor {
    const char  *name;
    unsigned int color;
} NSVGNamedColor;

NSVGNamedColor nsvg__colors[] = {

    {"red", NSVG_RGB(255, 0, 0)},
    {"green", NSVG_RGB(0, 128, 0)},
    {"blue", NSVG_RGB(0, 0, 255)},
    {"yellow", NSVG_RGB(255, 255, 0)},
    {"cyan", NSVG_RGB(0, 255, 255)},
    {"magenta", NSVG_RGB(255, 0, 255)},
    {"black", NSVG_RGB(0, 0, 0)},
    {"grey", NSVG_RGB(128, 128, 128)},
    {"gray", NSVG_RGB(128, 128, 128)},
    {"white", NSVG_RGB(255, 255, 255)},

#ifdef NANOSVG_ALL_COLOR_KEYWORDS
    {"aliceblue", NSVG_RGB(240, 248, 255)},
    {"antiquewhite", NSVG_RGB(250, 235, 215)},
    {"aqua", NSVG_RGB(0, 255, 255)},
    {"aquamarine", NSVG_RGB(127, 255, 212)},
    {"azure", NSVG_RGB(240, 255, 255)},
    {"beige", NSVG_RGB(245, 245, 220)},
    {"bisque", NSVG_RGB(255, 228, 196)},
    {"blanchedalmond", NSVG_RGB(255, 235, 205)},
    {"blueviolet", NSVG_RGB(138, 43, 226)},
    {"brown", NSVG_RGB(165, 42, 42)},
    {"burlywood", NSVG_RGB(222, 184, 135)},
    {"cadetblue", NSVG_RGB(95, 158, 160)},
    {"chartreuse", NSVG_RGB(127, 255, 0)},
    {"chocolate", NSVG_RGB(210, 105, 30)},
    {"coral", NSVG_RGB(255, 127, 80)},
    {"cornflowerblue", NSVG_RGB(100, 149, 237)},
    {"cornsilk", NSVG_RGB(255, 248, 220)},
    {"crimson", NSVG_RGB(220, 20, 60)},
    {"darkblue", NSVG_RGB(0, 0, 139)},
    {"darkcyan", NSVG_RGB(0, 139, 139)},
    {"darkgoldenrod", NSVG_RGB(184, 134, 11)},
    {"darkgray", NSVG_RGB(169, 169, 169)},
    {"darkgreen", NSVG_RGB(0, 100, 0)},
    {"darkgrey", NSVG_RGB(169, 169, 169)},
    {"darkkhaki", NSVG_RGB(189, 183, 107)},
    {"darkmagenta", NSVG_RGB(139, 0, 139)},
    {"darkolivegreen", NSVG_RGB(85, 107, 47)},
    {"darkorange", NSVG_RGB(255, 140, 0)},
    {"darkorchid", NSVG_RGB(153, 50, 204)},
    {"darkred", NSVG_RGB(139, 0, 0)},
    {"darksalmon", NSVG_RGB(233, 150, 122)},
    {"darkseagreen", NSVG_RGB(143, 188, 143)},
    {"darkslateblue", NSVG_RGB(72, 61, 139)},
    {"darkslategray", NSVG_RGB(47, 79, 79)},
    {"darkslategrey", NSVG_RGB(47, 79, 79)},
    {"darkturquoise", NSVG_RGB(0, 206, 209)},
    {"darkviolet", NSVG_RGB(148, 0, 211)},
    {"deeppink", NSVG_RGB(255, 20, 147)},
    {"deepskyblue", NSVG_RGB(0, 191, 255)},
    {"dimgray", NSVG_RGB(105, 105, 105)},
    {"dimgrey", NSVG_RGB(105, 105, 105)},
    {"dodgerblue", NSVG_RGB(30, 144, 255)},
    {"firebrick", NSVG_RGB(178, 34, 34)},
    {"floralwhite", NSVG_RGB(255, 250, 240)},
    {"forestgreen", NSVG_RGB(34, 139, 34)},
    {"fuchsia", NSVG_RGB(255, 0, 255)},
    {"gainsboro", NSVG_RGB(220, 220, 220)},
    {"ghostwhite", NSVG_RGB(248, 248, 255)},
    {"gold", NSVG_RGB(255, 215, 0)},
    {"goldenrod", NSVG_RGB(218, 165, 32)},
    {"greenyellow", NSVG_RGB(173, 255, 47)},
    {"honeydew", NSVG_RGB(240, 255, 240)},
    {"hotpink", NSVG_RGB(255, 105, 180)},
    {"indianred", NSVG_RGB(205, 92, 92)},
    {"indigo", NSVG_RGB(75, 0, 130)},
    {"ivory", NSVG_RGB(255, 255, 240)},
    {"khaki", NSVG_RGB(240, 230, 140)},
    {"lavender", NSVG_RGB(230, 230, 250)},
    {"lavenderblush", NSVG_RGB(255, 240, 245)},
    {"lawngreen", NSVG_RGB(124, 252, 0)},
    {"lemonchiffon", NSVG_RGB(255, 250, 205)},
    {"lightblue", NSVG_RGB(173, 216, 230)},
    {"lightcoral", NSVG_RGB(240, 128, 128)},
    {"lightcyan", NSVG_RGB(224, 255, 255)},
    {"lightgoldenrodyellow", NSVG_RGB(250, 250, 210)},
    {"lightgray", NSVG_RGB(211, 211, 211)},
    {"lightgreen", NSVG_RGB(144, 238, 144)},
    {"lightgrey", NSVG_RGB(211, 211, 211)},
    {"lightpink", NSVG_RGB(255, 182, 193)},
    {"lightsalmon", NSVG_RGB(255, 160, 122)},
    {"lightseagreen", NSVG_RGB(32, 178, 170)},
    {"lightskyblue", NSVG_RGB(135, 206, 250)},
    {"lightslategray", NSVG_RGB(119, 136, 153)},
    {"lightslategrey", NSVG_RGB(119, 136, 153)},
    {"lightsteelblue", NSVG_RGB(176, 196, 222)},
    {"lightyellow", NSVG_RGB(255, 255, 224)},
    {"lime", NSVG_RGB(0, 255, 0)},
    {"limegreen", NSVG_RGB(50, 205, 50)},
    {"linen", NSVG_RGB(250, 240, 230)},
    {"maroon", NSVG_RGB(128, 0, 0)},
    {"mediumaquamarine", NSVG_RGB(102, 205, 170)},
    {"mediumblue", NSVG_RGB(0, 0, 205)},
    {"mediumorchid", NSVG_RGB(186, 85, 211)},
    {"mediumpurple", NSVG_RGB(147, 112, 219)},
    {"mediumseagreen", NSVG_RGB(60, 179, 113)},
    {"mediumslateblue", NSVG_RGB(123, 104, 238)},
    {"mediumspringgreen", NSVG_RGB(0, 250, 154)},
    {"mediumturquoise", NSVG_RGB(72, 209, 204)},
    {"mediumvioletred", NSVG_RGB(199, 21, 133)},
    {"midnightblue", NSVG_RGB(25, 25, 112)},
    {"mintcream", NSVG_RGB(245, 255, 250)},
    {"mistyrose", NSVG_RGB(255, 228, 225)},
    {"moccasin", NSVG_RGB(255, 228, 181)},
    {"navajowhite", NSVG_RGB(255, 222, 173)},
    {"navy", NSVG_RGB(0, 0, 128)},
    {"oldlace", NSVG_RGB(253, 245, 230)},
    {"olive", NSVG_RGB(128, 128, 0)},
    {"olivedrab", NSVG_RGB(107, 142, 35)},
    {"orange", NSVG_RGB(255, 165, 0)},
    {"orangered", NSVG_RGB(255, 69, 0)},
    {"orchid", NSVG_RGB(218, 112, 214)},
    {"palegoldenrod", NSVG_RGB(238, 232, 170)},
    {"palegreen", NSVG_RGB(152, 251, 152)},
    {"paleturquoise", NSVG_RGB(175, 238, 238)},
    {"palevioletred", NSVG_RGB(219, 112, 147)},
    {"papayawhip", NSVG_RGB(255, 239, 213)},
    {"peachpuff", NSVG_RGB(255, 218, 185)},
    {"peru", NSVG_RGB(205, 133, 63)},
    {"pink", NSVG_RGB(255, 192, 203)},
    {"plum", NSVG_RGB(221, 160, 221)},
    {"powderblue", NSVG_RGB(176, 224, 230)},
    {"purple", NSVG_RGB(128, 0, 128)},
    {"rosybrown", NSVG_RGB(188, 143, 143)},
    {"royalblue", NSVG_RGB(65, 105, 225)},
    {"saddlebrown", NSVG_RGB(139, 69, 19)},
    {"salmon", NSVG_RGB(250, 128, 114)},
    {"sandybrown", NSVG_RGB(244, 164, 96)},
    {"seagreen", NSVG_RGB(46, 139, 87)},
    {"seashell", NSVG_RGB(255, 245, 238)},
    {"sienna", NSVG_RGB(160, 82, 45)},
    {"silver", NSVG_RGB(192, 192, 192)},
    {"skyblue", NSVG_RGB(135, 206, 235)},
    {"slateblue", NSVG_RGB(106, 90, 205)},
    {"slategray", NSVG_RGB(112, 128, 144)},
    {"slategrey", NSVG_RGB(112, 128, 144)},
    {"snow", NSVG_RGB(255, 250, 250)},
    {"springgreen", NSVG_RGB(0, 255, 127)},
    {"steelblue", NSVG_RGB(70, 130, 180)},
    {"tan", NSVG_RGB(210, 180, 140)},
    {"teal", NSVG_RGB(0, 128, 128)},
    {"thistle", NSVG_RGB(216, 191, 216)},
    {"tomato", NSVG_RGB(255, 99, 71)},
    {"turquoise", NSVG_RGB(64, 224, 208)},
    {"violet", NSVG_RGB(238, 130, 238)},
    {"wheat", NSVG_RGB(245, 222, 179)},
    {"whitesmoke", NSVG_RGB(245, 245, 245)},
    {"yellowgreen", NSVG_RGB(154, 205, 50)},
#endif
};

static unsigned int nsvg__parseColorName(const char *str) {
    int i, ncolors = sizeof(nsvg__colors) / sizeof(NSVGNamedColor);

    for (i = 0; i < ncolors; i++) {
        if (strcmp(nsvg__colors[i].name, str) == 0) {
            return nsvg__colors[i].color;
        }
    }

    return NSVG_RGB(128, 128, 128);
}

static unsigned int nsvg__parseColor(const char *str) {
    size_t len = 0;
    while (*str == ' ')
        ++str;
    len = strlen(str);
    if (len >= 1 && *str == '#')
        return nsvg__parseColorHex(str);
    else if (len >= 4 && str[0] == 'r' && str[1] == 'g' && str[2] == 'b' && str[3] == '(')
        return nsvg__parseColorRGB(str);
    return nsvg__parseColorName(str);
}

static float nsvg__parseOpacity(const char *str) {
    float val = 0;
    sscanf(str, "%f", &val);
    if (val < 0.0f)
        val = 0.0f;
    if (val > 1.0f)
        val = 1.0f;
    return val;
}

static float nsvg__parseMiterLimit(const char *str) {
    float val = 0;
    sscanf(str, "%f", &val);
    if (val < 0.0f)
        val = 0.0f;
    return val;
}

static int nsvg__parseUnits(const char *units) {
    if (units[0] == 'p' && units[1] == 'x')
        return NSVG_UNITS_PX;
    else if (units[0] == 'p' && units[1] == 't')
        return NSVG_UNITS_PT;
    else if (units[0] == 'p' && units[1] == 'c')
        return NSVG_UNITS_PC;
    else if (units[0] == 'm' && units[1] == 'm')
        return NSVG_UNITS_MM;
    else if (units[0] == 'c' && units[1] == 'm')
        return NSVG_UNITS_CM;
    else if (units[0] == 'i' && units[1] == 'n')
        return NSVG_UNITS_IN;
    else if (units[0] == '%')
        return NSVG_UNITS_PERCENT;
    else if (units[0] == 'e' && units[1] == 'm')
        return NSVG_UNITS_EM;
    else if (units[0] == 'e' && units[1] == 'x')
        return NSVG_UNITS_EX;
    return NSVG_UNITS_USER;
}

static NSVGcoordinate nsvg__parseCoordinateRaw(const char *str) {
    NSVGcoordinate coord     = {0, NSVG_UNITS_USER};
    char           units[32] = "";
    sscanf(str, "%f%31s", &coord.value, units);
    coord.units = nsvg__parseUnits(units);
    return coord;
}

static NSVGcoordinate nsvg__coord(float v, int units) {
    NSVGcoordinate coord = {v, units};
    return coord;
}

static float nsvg__parseCoordinate(NSVGparser *p, const char *str, float orig, float length) {
    NSVGcoordinate coord = nsvg__parseCoordinateRaw(str);
    return nsvg__convertToPixels(p, coord, orig, length);
}

static int nsvg__parseTransformArgs(const char *str, float *args, int maxNa, int *na) {
    const char *end;
    const char *ptr;
    char        it[64];

    *na = 0;
    ptr = str;
    while (*ptr && *ptr != '(')
        ++ptr;
    if (*ptr == 0)
        return 1;
    end = ptr;
    while (*end && *end != ')')
        ++end;
    if (*end == 0)
        return 1;

    while (ptr < end) {
        if (*ptr == '-' || *ptr == '+' || *ptr == '.' || nsvg__isdigit(*ptr)) {
            if (*na >= maxNa)
                return 0;
            ptr           = nsvg__parseNumber(ptr, it, 64);
            args[(*na)++] = (float)nsvg__atof(it);
        } else {
            ++ptr;
        }
    }
    return (int)(end - str);
}

static int nsvg__parseMatrix(float *xform, const char *str) {
    float t[6];
    int   na  = 0;
    int   len = nsvg__parseTransformArgs(str, t, 6, &na);
    if (na != 6)
        return len;
    memcpy(xform, t, sizeof(float) * 6);
    return len;
}

static int nsvg__parseTranslate(float *xform, const char *str) {
    float args[2];
    float t[6];
    int   na  = 0;
    int   len = nsvg__parseTransformArgs(str, args, 2, &na);
    if (na == 1)
        args[1] = 0.0;

    nsvg__xformSetTranslation(t, args[0], args[1]);
    memcpy(xform, t, sizeof(float) * 6);
    return len;
}

static int nsvg__parseScale(float *xform, const char *str) {
    float args[2];
    int   na = 0;
    float t[6];
    int   len = nsvg__parseTransformArgs(str, args, 2, &na);
    if (na == 1)
        args[1] = args[0];
    nsvg__xformSetScale(t, args[0], args[1]);
    memcpy(xform, t, sizeof(float) * 6);
    return len;
}

static int nsvg__parseSkewX(float *xform, const char *str) {
    float args[1];
    int   na = 0;
    float t[6];
    int   len = nsvg__parseTransformArgs(str, args, 1, &na);
    nsvg__xformSetSkewX(t, args[0] / 180.0f * NSVG_PI);
    memcpy(xform, t, sizeof(float) * 6);
    return len;
}

static int nsvg__parseSkewY(float *xform, const char *str) {
    float args[1];
    int   na = 0;
    float t[6];
    int   len = nsvg__parseTransformArgs(str, args, 1, &na);
    nsvg__xformSetSkewY(t, args[0] / 180.0f * NSVG_PI);
    memcpy(xform, t, sizeof(float) * 6);
    return len;
}

static int nsvg__parseRotate(float *xform, const char *str) {
    float args[3];
    int   na = 0;
    float m[6];
    float t[6];
    int   len = nsvg__parseTransformArgs(str, args, 3, &na);
    if (na == 1)
        args[1] = args[2] = 0.0f;
    nsvg__xformIdentity(m);

    if (na > 1) {
        nsvg__xformSetTranslation(t, -args[1], -args[2]);
        nsvg__xformMultiply(m, t);
    }

    nsvg__xformSetRotation(t, args[0] / 180.0f * NSVG_PI);
    nsvg__xformMultiply(m, t);

    if (na > 1) {
        nsvg__xformSetTranslation(t, args[1], args[2]);
        nsvg__xformMultiply(m, t);
    }

    memcpy(xform, m, sizeof(float) * 6);

    return len;
}

static void nsvg__parseTransform(float *xform, const char *str) {
    float t[6];
    nsvg__xformIdentity(xform);
    while (*str) {
        if (strncmp(str, "matrix", 6) == 0)
            str += nsvg__parseMatrix(t, str);
        else if (strncmp(str, "translate", 9) == 0)
            str += nsvg__parseTranslate(t, str);
        else if (strncmp(str, "scale", 5) == 0)
            str += nsvg__parseScale(t, str);
        else if (strncmp(str, "rotate", 6) == 0)
            str += nsvg__parseRotate(t, str);
        else if (strncmp(str, "skewX", 5) == 0)
            str += nsvg__parseSkewX(t, str);
        else if (strncmp(str, "skewY", 5) == 0)
            str += nsvg__parseSkewY(t, str);
        else {
            ++str;
            continue;
        }

        nsvg__xformPremultiply(xform, t);
    }
}

static void nsvg__parseUrl(char *id, const char *str) {
    int i = 0;
    str += 4; // "url(";
    if (*str == '#')
        str++;
    while (i < 63 && *str != ')') {
        id[i] = *str++;
        i++;
    }
    id[i] = '\0';
}

static char nsvg__parseLineCap(const char *str) {
    if (strcmp(str, "butt") == 0)
        return NSVG_CAP_BUTT;
    else if (strcmp(str, "round") == 0)
        return NSVG_CAP_ROUND;
    else if (strcmp(str, "square") == 0)
        return NSVG_CAP_SQUARE;
    // TODO: handle inherit.
    return NSVG_CAP_BUTT;
}

static char nsvg__parseLineJoin(const char *str) {
    if (strcmp(str, "miter") == 0)
        return NSVG_JOIN_MITER;
    else if (strcmp(str, "round") == 0)
        return NSVG_JOIN_ROUND;
    else if (strcmp(str, "bevel") == 0)
        return NSVG_JOIN_BEVEL;
    // TODO: handle inherit.
    return NSVG_JOIN_MITER;
}

static char nsvg__parseFillRule(const char *str) {
    if (strcmp(str, "nonzero") == 0)
        return NSVG_FILLRULE_NONZERO;
    else if (strcmp(str, "evenodd") == 0)
        return NSVG_FILLRULE_EVENODD;
    // TODO: handle inherit.
    return NSVG_FILLRULE_NONZERO;
}

static const char *nsvg__getNextDashItem(const char *s, char *it) {
    int n = 0;
    it[0] = '\0';
    // Skip white spaces and commas
    while (*s && (nsvg__isspace(*s) || *s == ','))
        s++;
    // Advance until whitespace, comma or end.
    while (*s && (!nsvg__isspace(*s) && *s != ',')) {
        if (n < 63)
            it[n++] = *s;
        s++;
    }
    it[n++] = '\0';
    return s;
}

static int nsvg__parseStrokeDashArray(NSVGparser *p, const char *str, float *strokeDashArray) {
    char  item[64];
    int   count = 0, i;
    float sum   = 0.0f;

    // Handle "none"
    if (str[0] == 'n')
        return 0;

    // Parse dashes
    while (*str) {
        str = nsvg__getNextDashItem(str, item);
        if (!*item)
            break;
        if (count < NSVG_MAX_DASHES)
            strokeDashArray[count++] = fabsf(nsvg__parseCoordinate(p, item, 0.0f, nsvg__actualLength(p)));
    }

    for (i = 0; i < count; i++)
        sum += strokeDashArray[i];
    if (sum <= 1e-6f)
        count = 0;

    return count;
}

static void nsvg__parseStyle(NSVGparser *p, const char *str);

static int nsvg__parseAttr(NSVGparser *p, const char *name, const char *value) {
    float       xform[6];
    NSVGattrib *attr = nsvg__getAttr(p);
    if (!attr)
        return 0;

    if (strcmp(name, "style") == 0) {
        nsvg__parseStyle(p, value);
    } else if (strcmp(name, "display") == 0) {
        if (strcmp(value, "none") == 0)
            attr->visible = 0;
        // Don't reset ->visible on display:inline, one display:none hides the whole subtree

    } else if (strcmp(name, "fill") == 0) {
        if (strcmp(value, "none") == 0) {
            attr->hasFill = 0;
        } else if (strncmp(value, "url(", 4) == 0) {
            attr->hasFill = 2;
            nsvg__parseUrl(attr->fillGradient, value);
        } else {
            attr->hasFill   = 1;
            attr->fillColor = nsvg__parseColor(value);
        }
    } else if (strcmp(name, "opacity") == 0) {
        attr->opacity = nsvg__parseOpacity(value);
    } else if (strcmp(name, "fill-opacity") == 0) {
        attr->fillOpacity = nsvg__parseOpacity(value);
    } else if (strcmp(name, "stroke") == 0) {
        if (strcmp(value, "none") == 0) {
            attr->hasStroke = 0;
        } else if (strncmp(value, "url(", 4) == 0) {
            attr->hasStroke = 2;
            nsvg__parseUrl(attr->strokeGradient, value);
        } else {
            attr->hasStroke   = 1;
            attr->strokeColor = nsvg__parseColor(value);
        }
    } else if (strcmp(name, "stroke-width") == 0) {
        attr->strokeWidth = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
    } else if (strcmp(name, "stroke-dasharray") == 0) {
        attr->strokeDashCount = nsvg__parseStrokeDashArray(p, value, attr->strokeDashArray);
    } else if (strcmp(name, "stroke-dashoffset") == 0) {
        attr->strokeDashOffset = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
    } else if (strcmp(name, "stroke-opacity") == 0) {
        attr->strokeOpacity = nsvg__parseOpacity(value);
    } else if (strcmp(name, "stroke-linecap") == 0) {
        attr->strokeLineCap = nsvg__parseLineCap(value);
    } else if (strcmp(name, "stroke-linejoin") == 0) {
        attr->strokeLineJoin = nsvg__parseLineJoin(value);
    } else if (strcmp(name, "stroke-miterlimit") == 0) {
        attr->miterLimit = nsvg__parseMiterLimit(value);
    } else if (strcmp(name, "fill-rule") == 0) {
        attr->fillRule = nsvg__parseFillRule(value);
    } else if (strcmp(name, "font-size") == 0) {
        attr->fontSize = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
    } else if (strcmp(name, "transform") == 0) {
        nsvg__parseTransform(xform, value);
        nsvg__xformPremultiply(attr->xform, xform);
    } else if (strcmp(name, "stop-color") == 0) {
        attr->stopColor = nsvg__parseColor(value);
    } else if (strcmp(name, "stop-opacity") == 0) {
        attr->stopOpacity = nsvg__parseOpacity(value);
    } else if (strcmp(name, "offset") == 0) {
        attr->stopOffset = nsvg__parseCoordinate(p, value, 0.0f, 1.0f);
    } else if (strcmp(name, "id") == 0) {
        strncpy(attr->id, value, 63);
        attr->id[63] = '\0';
    } else {
        return 0;
    }
    return 1;
}

static int nsvg__parseNameValue(NSVGparser *p, const char *start, const char *end) {
    const char *str;
    const char *val;
    char        name[512];
    char        value[512];
    int         n;

    str = start;
    while (str < end && *str != ':')
        ++str;

    val = str;

    // Right Trim
    while (str > start && (*str == ':' || nsvg__isspace(*str)))
        --str;
    ++str;

    n = (int)(str - start);
    if (n > 511)
        n = 511;
    if (n)
        memcpy(name, start, n);
    name[n] = 0;

    while (val < end && (*val == ':' || nsvg__isspace(*val)))
        ++val;

    n = (int)(end - val);
    if (n > 511)
        n = 511;
    if (n)
        memcpy(value, val, n);
    value[n] = 0;

    return nsvg__parseAttr(p, name, value);
}

static void nsvg__parseStyle(NSVGparser *p, const char *str) {
    const char *start;
    const char *end;

    while (*str) {
        // Left Trim
        while (*str && nsvg__isspace(*str))
            ++str;
        start = str;
        while (*str && *str != ';')
            ++str;
        end = str;

        // Right Trim
        while (end > start && (*end == ';' || nsvg__isspace(*end)))
            --end;
        ++end;

        nsvg__parseNameValue(p, start, end);
        if (*str)
            ++str;
    }
}

static void nsvg__parseAttribs(NSVGparser *p, const char **attr) {
    int i;
    for (i = 0; attr[i]; i += 2) {
        if (strcmp(attr[i], "style") == 0)
            nsvg__parseStyle(p, attr[i + 1]);
        else
            nsvg__parseAttr(p, attr[i], attr[i + 1]);
    }
}

static int nsvg__getArgsPerElement(char cmd) {
    switch (cmd) {
    case 'v':
    case 'V':
    case 'h':
    case 'H':
        return 1;
    case 'm':
    case 'M':
    case 'l':
    case 'L':
    case 't':
    case 'T':
        return 2;
    case 'q':
    case 'Q':
    case 's':
    case 'S':
        return 4;
    case 'c':
    case 'C':
        return 6;
    case 'a':
    case 'A':
        return 7;
    }
    return 0;
}

static void nsvg__pathMoveTo(NSVGparser *p, float *cpx, float *cpy, float *args, int rel) {
    if (rel) {
        *cpx += args[0];
        *cpy += args[1];
    } else {
        *cpx = args[0];
        *cpy = args[1];
    }
    nsvg__moveTo(p, *cpx, *cpy);
}

static void nsvg__pathLineTo(NSVGparser *p, float *cpx, float *cpy, float *args, int rel) {
    if (rel) {
        *cpx += args[0];
        *cpy += args[1];
    } else {
        *cpx = args[0];
        *cpy = args[1];
    }
    nsvg__lineTo(p, *cpx, *cpy);
}

static void nsvg__pathHLineTo(NSVGparser *p, float *cpx, float *cpy, float *args, int rel) {
    if (rel)
        *cpx += args[0];
    else
        *cpx = args[0];
    nsvg__lineTo(p, *cpx, *cpy);
}

static void nsvg__pathVLineTo(NSVGparser *p, float *cpx, float *cpy, float *args, int rel) {
    if (rel)
        *cpy += args[0];
    else
        *cpy = args[0];
    nsvg__lineTo(p, *cpx, *cpy);
}

static void nsvg__pathCubicBezTo(NSVGparser *p, float *cpx, float *cpy, float *cpx2, float *cpy2, float *args,
                                 int rel) {
    float x2, y2, cx1, cy1, cx2, cy2;

    if (rel) {
        cx1 = *cpx + args[0];
        cy1 = *cpy + args[1];
        cx2 = *cpx + args[2];
        cy2 = *cpy + args[3];
        x2  = *cpx + args[4];
        y2  = *cpy + args[5];
    } else {
        cx1 = args[0];
        cy1 = args[1];
        cx2 = args[2];
        cy2 = args[3];
        x2  = args[4];
        y2  = args[5];
    }

    nsvg__cubicBezTo(p, cx1, cy1, cx2, cy2, x2, y2);

    *cpx2 = cx2;
    *cpy2 = cy2;
    *cpx  = x2;
    *cpy  = y2;
}

static void nsvg__pathCubicBezShortTo(NSVGparser *p, float *cpx, float *cpy, float *cpx2, float *cpy2, float *args,
                                      int rel) {
    float x1, y1, x2, y2, cx1, cy1, cx2, cy2;

    x1 = *cpx;
    y1 = *cpy;
    if (rel) {
        cx2 = *cpx + args[0];
        cy2 = *cpy + args[1];
        x2  = *cpx + args[2];
        y2  = *cpy + args[3];
    } else {
        cx2 = args[0];
        cy2 = args[1];
        x2  = args[2];
        y2  = args[3];
    }

    cx1 = 2 * x1 - *cpx2;
    cy1 = 2 * y1 - *cpy2;

    nsvg__cubicBezTo(p, cx1, cy1, cx2, cy2, x2, y2);

    *cpx2 = cx2;
    *cpy2 = cy2;
    *cpx  = x2;
    *cpy  = y2;
}

static void nsvg__pathQuadBezTo(NSVGparser *p, float *cpx, float *cpy, float *cpx2, float *cpy2, float *args, int rel) {
    float x1, y1, x2, y2, cx, cy;
    float cx1, cy1, cx2, cy2;

    x1 = *cpx;
    y1 = *cpy;
    if (rel) {
        cx = *cpx + args[0];
        cy = *cpy + args[1];
        x2 = *cpx + args[2];
        y2 = *cpy + args[3];
    } else {
        cx = args[0];
        cy = args[1];
        x2 = args[2];
        y2 = args[3];
    }

    // Convert to cubic bezier
    cx1 = x1 + 2.0f / 3.0f * (cx - x1);
    cy1 = y1 + 2.0f / 3.0f * (cy - y1);
    cx2 = x2 + 2.0f / 3.0f * (cx - x2);
    cy2 = y2 + 2.0f / 3.0f * (cy - y2);

    nsvg__cubicBezTo(p, cx1, cy1, cx2, cy2, x2, y2);

    *cpx2 = cx;
    *cpy2 = cy;
    *cpx  = x2;
    *cpy  = y2;
}

static void nsvg__pathQuadBezShortTo(NSVGparser *p, float *cpx, float *cpy, float *cpx2, float *cpy2, float *args,
                                     int rel) {
    float x1, y1, x2, y2, cx, cy;
    float cx1, cy1, cx2, cy2;

    x1 = *cpx;
    y1 = *cpy;
    if (rel) {
        x2 = *cpx + args[0];
        y2 = *cpy + args[1];
    } else {
        x2 = args[0];
        y2 = args[1];
    }

    cx = 2 * x1 - *cpx2;
    cy = 2 * y1 - *cpy2;

    // Convert to cubix bezier
    cx1 = x1 + 2.0f / 3.0f * (cx - x1);
    cy1 = y1 + 2.0f / 3.0f * (cy - y1);
    cx2 = x2 + 2.0f / 3.0f * (cx - x2);
    cy2 = y2 + 2.0f / 3.0f * (cy - y2);

    nsvg__cubicBezTo(p, cx1, cy1, cx2, cy2, x2, y2);

    *cpx2 = cx;
    *cpy2 = cy;
    *cpx  = x2;
    *cpy  = y2;
}

static float nsvg__sqr(float x) { return x * x; }
static float nsvg__vmag(float x, float y) { return sqrtf(x * x + y * y); }

static float nsvg__vecrat(float ux, float uy, float vx, float vy) {
    return (ux * vx + uy * vy) / (nsvg__vmag(ux, uy) * nsvg__vmag(vx, vy));
}

static float nsvg__vecang(float ux, float uy, float vx, float vy) {
    float r = nsvg__vecrat(ux, uy, vx, vy);
    if (r < -1.0f)
        r = -1.0f;
    if (r > 1.0f)
        r = 1.0f;
    return ((ux * vy < uy * vx) ? -1.0f : 1.0f) * acosf(r);
}

static void nsvg__pathArcTo(NSVGparser *p, float *cpx, float *cpy, float *args, int rel) {
    // Ported from canvg (https://code.google.com/p/canvg/)
    float rx, ry, rotx;
    float x1, y1, x2, y2, cx, cy, dx, dy, d;
    float x1p, y1p, cxp, cyp, s, sa, sb;
    float ux, uy, vx, vy, a1, da;
    float x, y, tanx, tany, a, px = 0, py = 0, ptanx = 0, ptany = 0, t[6];
    float sinrx, cosrx;
    int   fa, fs;
    int   i, ndivs;
    float hda, kappa;

    rx   = fabsf(args[0]);                // y radius
    ry   = fabsf(args[1]);                // x radius
    rotx = args[2] / 180.0f * NSVG_PI;    // x rotation angle
    fa   = fabsf(args[3]) > 1e-6 ? 1 : 0; // Large arc
    fs   = fabsf(args[4]) > 1e-6 ? 1 : 0; // Sweep direction
    x1   = *cpx;                          // start point
    y1   = *cpy;
    if (rel) { // end point
        x2 = *cpx + args[5];
        y2 = *cpy + args[6];
    } else {
        x2 = args[5];
        y2 = args[6];
    }

    dx = x1 - x2;
    dy = y1 - y2;
    d  = sqrtf(dx * dx + dy * dy);
    if (d < 1e-6f || rx < 1e-6f || ry < 1e-6f) {
        // The arc degenerates to a line
        nsvg__lineTo(p, x2, y2);
        *cpx = x2;
        *cpy = y2;
        return;
    }

    sinrx = sinf(rotx);
    cosrx = cosf(rotx);

    // Convert to center point parameterization.
    // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
    // 1) Compute x1', y1'
    x1p = cosrx * dx / 2.0f + sinrx * dy / 2.0f;
    y1p = -sinrx * dx / 2.0f + cosrx * dy / 2.0f;
    d   = nsvg__sqr(x1p) / nsvg__sqr(rx) + nsvg__sqr(y1p) / nsvg__sqr(ry);
    if (d > 1) {
        d = sqrtf(d);
        rx *= d;
        ry *= d;
    }
    // 2) Compute cx', cy'
    s  = 0.0f;
    sa = nsvg__sqr(rx) * nsvg__sqr(ry) - nsvg__sqr(rx) * nsvg__sqr(y1p) - nsvg__sqr(ry) * nsvg__sqr(x1p);
    sb = nsvg__sqr(rx) * nsvg__sqr(y1p) + nsvg__sqr(ry) * nsvg__sqr(x1p);
    if (sa < 0.0f)
        sa = 0.0f;
    if (sb > 0.0f)
        s = sqrtf(sa / sb);
    if (fa == fs)
        s = -s;
    cxp = s * rx * y1p / ry;
    cyp = s * -ry * x1p / rx;

    // 3) Compute cx,cy from cx',cy'
    cx = (x1 + x2) / 2.0f + cosrx * cxp - sinrx * cyp;
    cy = (y1 + y2) / 2.0f + sinrx * cxp + cosrx * cyp;

    // 4) Calculate theta1, and delta theta.
    ux = (x1p - cxp) / rx;
    uy = (y1p - cyp) / ry;
    vx = (-x1p - cxp) / rx;
    vy = (-y1p - cyp) / ry;
    a1 = nsvg__vecang(1.0f, 0.0f, ux, uy); // Initial angle
    da = nsvg__vecang(ux, uy, vx, vy);     // Delta angle

    //	if (vecrat(ux,uy,vx,vy) <= -1.0f) da = NSVG_PI;
    //	if (vecrat(ux,uy,vx,vy) >= 1.0f) da = 0;

    if (fs == 0 && da > 0)
        da -= 2 * NSVG_PI;
    else if (fs == 1 && da < 0)
        da += 2 * NSVG_PI;

    // Approximate the arc using cubic spline segments.
    t[0] = cosrx;
    t[1] = sinrx;
    t[2] = -sinrx;
    t[3] = cosrx;
    t[4] = cx;
    t[5] = cy;

    // Split arc into max 90 degree segments.
    // The loop assumes an iteration per end point (including start and end), this +1.
    ndivs = (int)(fabsf(da) / (NSVG_PI * 0.5f) + 1.0f);
    hda   = (da / (float)ndivs) / 2.0f;
    kappa = fabsf(4.0f / 3.0f * (1.0f - cosf(hda)) / sinf(hda));
    if (da < 0.0f)
        kappa = -kappa;

    for (i = 0; i <= ndivs; i++) {
        a  = a1 + da * ((float)i / (float)ndivs);
        dx = cosf(a);
        dy = sinf(a);
        nsvg__xformPoint(&x, &y, dx * rx, dy * ry, t);                      // position
        nsvg__xformVec(&tanx, &tany, -dy * rx * kappa, dx * ry * kappa, t); // tangent
        if (i > 0)
            nsvg__cubicBezTo(p, px + ptanx, py + ptany, x - tanx, y - tany, x, y);
        px    = x;
        py    = y;
        ptanx = tanx;
        ptany = tany;
    }

    *cpx = x2;
    *cpy = y2;
}

static void nsvg__parsePath(NSVGparser *p, const char **attr) {
    const char *s   = NULL;
    char        cmd = '\0';
    float       args[10];
    int         nargs;
    int         rargs = 0;
    float       cpx, cpy, cpx2, cpy2;
    const char *tmp[4];
    char        closedFlag;
    int         i;
    char        item[64];

    for (i = 0; attr[i]; i += 2) {
        if (strcmp(attr[i], "d") == 0) {
            s = attr[i + 1];
        } else {
            tmp[0] = attr[i];
            tmp[1] = attr[i + 1];
            tmp[2] = 0;
            tmp[3] = 0;
            nsvg__parseAttribs(p, tmp);
        }
    }

    if (s) {
        nsvg__resetPath(p);
        cpx        = 0;
        cpy        = 0;
        cpx2       = 0;
        cpy2       = 0;
        closedFlag = 0;
        nargs      = 0;

        while (*s) {
            s = nsvg__getNextPathItem(s, item);
            if (!*item)
                break;
            if (nsvg__isnum(item[0])) {
                if (nargs < 10)
                    args[nargs++] = (float)nsvg__atof(item);
                if (nargs >= rargs) {
                    switch (cmd) {
                    case 'm':
                    case 'M':
                        nsvg__pathMoveTo(p, &cpx, &cpy, args, cmd == 'm' ? 1 : 0);
                        // Moveto can be followed by multiple coordinate pairs,
                        // which should be treated as linetos.
                        cmd   = (cmd == 'm') ? 'l' : 'L';
                        rargs = nsvg__getArgsPerElement(cmd);
                        cpx2  = cpx;
                        cpy2  = cpy;
                        break;
                    case 'l':
                    case 'L':
                        nsvg__pathLineTo(p, &cpx, &cpy, args, cmd == 'l' ? 1 : 0);
                        cpx2 = cpx;
                        cpy2 = cpy;
                        break;
                    case 'H':
                    case 'h':
                        nsvg__pathHLineTo(p, &cpx, &cpy, args, cmd == 'h' ? 1 : 0);
                        cpx2 = cpx;
                        cpy2 = cpy;
                        break;
                    case 'V':
                    case 'v':
                        nsvg__pathVLineTo(p, &cpx, &cpy, args, cmd == 'v' ? 1 : 0);
                        cpx2 = cpx;
                        cpy2 = cpy;
                        break;
                    case 'C':
                    case 'c':
                        nsvg__pathCubicBezTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 'c' ? 1 : 0);
                        break;
                    case 'S':
                    case 's':
                        nsvg__pathCubicBezShortTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 's' ? 1 : 0);
                        break;
                    case 'Q':
                    case 'q':
                        nsvg__pathQuadBezTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 'q' ? 1 : 0);
                        break;
                    case 'T':
                    case 't':
                        nsvg__pathQuadBezShortTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 't' ? 1 : 0);
                        break;
                    case 'A':
                    case 'a':
                        nsvg__pathArcTo(p, &cpx, &cpy, args, cmd == 'a' ? 1 : 0);
                        cpx2 = cpx;
                        cpy2 = cpy;
                        break;
                    default:
                        if (nargs >= 2) {
                            cpx  = args[nargs - 2];
                            cpy  = args[nargs - 1];
                            cpx2 = cpx;
                            cpy2 = cpy;
                        }
                        break;
                    }
                    nargs = 0;
                }
            } else {
                cmd   = item[0];
                rargs = nsvg__getArgsPerElement(cmd);
                if (cmd == 'M' || cmd == 'm') {
                    // Commit path.
                    if (p->npts > 0)
                        nsvg__addPath(p, closedFlag);
                    // Start new subpath.
                    nsvg__resetPath(p);
                    closedFlag = 0;
                    nargs      = 0;
                } else if (cmd == 'Z' || cmd == 'z') {
                    closedFlag = 1;
                    // Commit path.
                    if (p->npts > 0) {
                        // Move current point to first point
                        cpx  = p->pts[0];
                        cpy  = p->pts[1];
                        cpx2 = cpx;
                        cpy2 = cpy;
                        nsvg__addPath(p, closedFlag);
                    }
                    // Start new subpath.
                    nsvg__resetPath(p);
                    nsvg__moveTo(p, cpx, cpy);
                    closedFlag = 0;
                    nargs      = 0;
                }
            }
        }
        // Commit path.
        if (p->npts)
            nsvg__addPath(p, closedFlag);
    }

    nsvg__addShape(p);
}

static void nsvg__parseRect(NSVGparser *p, const char **attr) {
    float x  = 0.0f;
    float y  = 0.0f;
    float w  = 0.0f;
    float h  = 0.0f;
    float rx = -1.0f; // marks not set
    float ry = -1.0f;
    int   i;

    for (i = 0; attr[i]; i += 2) {
        if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
            if (strcmp(attr[i], "x") == 0)
                x = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
            if (strcmp(attr[i], "y") == 0)
                y = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
            if (strcmp(attr[i], "width") == 0)
                w = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, nsvg__actualWidth(p));
            if (strcmp(attr[i], "height") == 0)
                h = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, nsvg__actualHeight(p));
            if (strcmp(attr[i], "rx") == 0)
                rx = fabsf(nsvg__parseCoordinate(p, attr[i + 1], 0.0f, nsvg__actualWidth(p)));
            if (strcmp(attr[i], "ry") == 0)
                ry = fabsf(nsvg__parseCoordinate(p, attr[i + 1], 0.0f, nsvg__actualHeight(p)));
        }
    }

    if (rx < 0.0f && ry > 0.0f)
        rx = ry;
    if (ry < 0.0f && rx > 0.0f)
        ry = rx;
    if (rx < 0.0f)
        rx = 0.0f;
    if (ry < 0.0f)
        ry = 0.0f;
    if (rx > w / 2.0f)
        rx = w / 2.0f;
    if (ry > h / 2.0f)
        ry = h / 2.0f;

    if (w != 0.0f && h != 0.0f) {
        nsvg__resetPath(p);

        if (rx < 0.00001f || ry < 0.0001f) {
            nsvg__moveTo(p, x, y);
            nsvg__lineTo(p, x + w, y);
            nsvg__lineTo(p, x + w, y + h);
            nsvg__lineTo(p, x, y + h);
        } else {
            // Rounded rectangle
            nsvg__moveTo(p, x + rx, y);
            nsvg__lineTo(p, x + w - rx, y);
            nsvg__cubicBezTo(p, x + w - rx * (1 - NSVG_KAPPA90), y, x + w, y + ry * (1 - NSVG_KAPPA90), x + w, y + ry);
            nsvg__lineTo(p, x + w, y + h - ry);
            nsvg__cubicBezTo(p, x + w, y + h - ry * (1 - NSVG_KAPPA90), x + w - rx * (1 - NSVG_KAPPA90), y + h,
                             x + w - rx, y + h);
            nsvg__lineTo(p, x + rx, y + h);
            nsvg__cubicBezTo(p, x + rx * (1 - NSVG_KAPPA90), y + h, x, y + h - ry * (1 - NSVG_KAPPA90), x, y + h - ry);
            nsvg__lineTo(p, x, y + ry);
            nsvg__cubicBezTo(p, x, y + ry * (1 - NSVG_KAPPA90), x + rx * (1 - NSVG_KAPPA90), y, x + rx, y);
        }

        nsvg__addPath(p, 1);

        nsvg__addShape(p);
    }
}

static void nsvg__parseCircle(NSVGparser *p, const char **attr) {
    float cx = 0.0f;
    float cy = 0.0f;
    float r  = 0.0f;
    int   i;

    for (i = 0; attr[i]; i += 2) {
        if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
            if (strcmp(attr[i], "cx") == 0)
                cx = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
            if (strcmp(attr[i], "cy") == 0)
                cy = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
            if (strcmp(attr[i], "r") == 0)
                r = fabsf(nsvg__parseCoordinate(p, attr[i + 1], 0.0f, nsvg__actualLength(p)));
        }
    }

    if (r > 0.0f) {
        nsvg__resetPath(p);

        nsvg__moveTo(p, cx + r, cy);
        nsvg__cubicBezTo(p, cx + r, cy + r * NSVG_KAPPA90, cx + r * NSVG_KAPPA90, cy + r, cx, cy + r);
        nsvg__cubicBezTo(p, cx - r * NSVG_KAPPA90, cy + r, cx - r, cy + r * NSVG_KAPPA90, cx - r, cy);
        nsvg__cubicBezTo(p, cx - r, cy - r * NSVG_KAPPA90, cx - r * NSVG_KAPPA90, cy - r, cx, cy - r);
        nsvg__cubicBezTo(p, cx + r * NSVG_KAPPA90, cy - r, cx + r, cy - r * NSVG_KAPPA90, cx + r, cy);

        nsvg__addPath(p, 1);

        nsvg__addShape(p);
    }
}

static void nsvg__parseEllipse(NSVGparser *p, const char **attr) {
    float cx = 0.0f;
    float cy = 0.0f;
    float rx = 0.0f;
    float ry = 0.0f;
    int   i;

    for (i = 0; attr[i]; i += 2) {
        if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
            if (strcmp(attr[i], "cx") == 0)
                cx = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
            if (strcmp(attr[i], "cy") == 0)
                cy = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
            if (strcmp(attr[i], "rx") == 0)
                rx = fabsf(nsvg__parseCoordinate(p, attr[i + 1], 0.0f, nsvg__actualWidth(p)));
            if (strcmp(attr[i], "ry") == 0)
                ry = fabsf(nsvg__parseCoordinate(p, attr[i + 1], 0.0f, nsvg__actualHeight(p)));
        }
    }

    if (rx > 0.0f && ry > 0.0f) {

        nsvg__resetPath(p);

        nsvg__moveTo(p, cx + rx, cy);
        nsvg__cubicBezTo(p, cx + rx, cy + ry * NSVG_KAPPA90, cx + rx * NSVG_KAPPA90, cy + ry, cx, cy + ry);
        nsvg__cubicBezTo(p, cx - rx * NSVG_KAPPA90, cy + ry, cx - rx, cy + ry * NSVG_KAPPA90, cx - rx, cy);
        nsvg__cubicBezTo(p, cx - rx, cy - ry * NSVG_KAPPA90, cx - rx * NSVG_KAPPA90, cy - ry, cx, cy - ry);
        nsvg__cubicBezTo(p, cx + rx * NSVG_KAPPA90, cy - ry, cx + rx, cy - ry * NSVG_KAPPA90, cx + rx, cy);

        nsvg__addPath(p, 1);

        nsvg__addShape(p);
    }
}

static void nsvg__parseLine(NSVGparser *p, const char **attr) {
    float x1 = 0.0;
    float y1 = 0.0;
    float x2 = 0.0;
    float y2 = 0.0;
    int   i;

    for (i = 0; attr[i]; i += 2) {
        if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
            if (strcmp(attr[i], "x1") == 0)
                x1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
            if (strcmp(attr[i], "y1") == 0)
                y1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
            if (strcmp(attr[i], "x2") == 0)
                x2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
            if (strcmp(attr[i], "y2") == 0)
                y2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
        }
    }

    nsvg__resetPath(p);

    nsvg__moveTo(p, x1, y1);
    nsvg__lineTo(p, x2, y2);

    nsvg__addPath(p, 0);

    nsvg__addShape(p);
}

static void nsvg__parsePoly(NSVGparser *p, const char **attr, int closeFlag) {
    int         i;
    const char *s;
    float       args[2];
    int         nargs, npts = 0;
    char        item[64];

    nsvg__resetPath(p);

    for (i = 0; attr[i]; i += 2) {
        if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
            if (strcmp(attr[i], "points") == 0) {
                s     = attr[i + 1];
                nargs = 0;
                while (*s) {
                    s             = nsvg__getNextPathItem(s, item);
                    args[nargs++] = (float)nsvg__atof(item);
                    if (nargs >= 2) {
                        if (npts == 0)
                            nsvg__moveTo(p, args[0], args[1]);
                        else
                            nsvg__lineTo(p, args[0], args[1]);
                        nargs = 0;
                        npts++;
                    }
                }
            }
        }
    }

    nsvg__addPath(p, (char)closeFlag);

    nsvg__addShape(p);
}

static void nsvg__parseSVG(NSVGparser *p, const char **attr) {
    int i;
    for (i = 0; attr[i]; i += 2) {
        if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
            if (strcmp(attr[i], "width") == 0) {
                p->image->width = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 0.0f);
            } else if (strcmp(attr[i], "height") == 0) {
                p->image->height = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 0.0f);
            } else if (strcmp(attr[i], "viewBox") == 0) {
                sscanf(attr[i + 1], "%f%*[%%, \t]%f%*[%%, \t]%f%*[%%, \t]%f", &p->viewMinx, &p->viewMiny, &p->viewWidth,
                       &p->viewHeight);
            } else if (strcmp(attr[i], "preserveAspectRatio") == 0) {
                if (strstr(attr[i + 1], "none") != 0) {
                    // No uniform scaling
                    p->alignType = NSVG_ALIGN_NONE;
                } else {
                    // Parse X align
                    if (strstr(attr[i + 1], "xMin") != 0)
                        p->alignX = NSVG_ALIGN_MIN;
                    else if (strstr(attr[i + 1], "xMid") != 0)
                        p->alignX = NSVG_ALIGN_MID;
                    else if (strstr(attr[i + 1], "xMax") != 0)
                        p->alignX = NSVG_ALIGN_MAX;
                    // Parse X align
                    if (strstr(attr[i + 1], "yMin") != 0)
                        p->alignY = NSVG_ALIGN_MIN;
                    else if (strstr(attr[i + 1], "yMid") != 0)
                        p->alignY = NSVG_ALIGN_MID;
                    else if (strstr(attr[i + 1], "yMax") != 0)
                        p->alignY = NSVG_ALIGN_MAX;
                    // Parse meet/slice
                    p->alignType = NSVG_ALIGN_MEET;
                    if (strstr(attr[i + 1], "slice") != 0)
                        p->alignType = NSVG_ALIGN_SLICE;
                }
            }
        }
    }
}

static void nsvg__parseGradient(NSVGparser *p, const char **attr, char type) {
    int               i;
    NSVGgradientData *grad = (NSVGgradientData *)malloc(sizeof(NSVGgradientData));
    if (grad == NULL)
        return;
    memset(grad, 0, sizeof(NSVGgradientData));
    grad->units = NSVG_OBJECT_SPACE;
    grad->type  = type;
    if (grad->type == NSVG_PAINT_LINEAR_GRADIENT) {
        grad->linear.x1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
        grad->linear.y1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
        grad->linear.x2 = nsvg__coord(100.0f, NSVG_UNITS_PERCENT);
        grad->linear.y2 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
    } else if (grad->type == NSVG_PAINT_RADIAL_GRADIENT) {
        grad->radial.cx = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
        grad->radial.cy = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
        grad->radial.r  = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
    }

    nsvg__xformIdentity(grad->xform);

    for (i = 0; attr[i]; i += 2) {
        if (strcmp(attr[i], "id") == 0) {
            strncpy(grad->id, attr[i + 1], 63);
            grad->id[63] = '\0';
        } else if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
            if (strcmp(attr[i], "gradientUnits") == 0) {
                if (strcmp(attr[i + 1], "objectBoundingBox") == 0)
                    grad->units = NSVG_OBJECT_SPACE;
                else
                    grad->units = NSVG_USER_SPACE;
            } else if (strcmp(attr[i], "gradientTransform") == 0) {
                nsvg__parseTransform(grad->xform, attr[i + 1]);
            } else if (strcmp(attr[i], "cx") == 0) {
                grad->radial.cx = nsvg__parseCoordinateRaw(attr[i + 1]);
            } else if (strcmp(attr[i], "cy") == 0) {
                grad->radial.cy = nsvg__parseCoordinateRaw(attr[i + 1]);
            } else if (strcmp(attr[i], "r") == 0) {
                grad->radial.r = nsvg__parseCoordinateRaw(attr[i + 1]);
            } else if (strcmp(attr[i], "fx") == 0) {
                grad->radial.fx = nsvg__parseCoordinateRaw(attr[i + 1]);
            } else if (strcmp(attr[i], "fy") == 0) {
                grad->radial.fy = nsvg__parseCoordinateRaw(attr[i + 1]);
            } else if (strcmp(attr[i], "x1") == 0) {
                grad->linear.x1 = nsvg__parseCoordinateRaw(attr[i + 1]);
            } else if (strcmp(attr[i], "y1") == 0) {
                grad->linear.y1 = nsvg__parseCoordinateRaw(attr[i + 1]);
            } else if (strcmp(attr[i], "x2") == 0) {
                grad->linear.x2 = nsvg__parseCoordinateRaw(attr[i + 1]);
            } else if (strcmp(attr[i], "y2") == 0) {
                grad->linear.y2 = nsvg__parseCoordinateRaw(attr[i + 1]);
            } else if (strcmp(attr[i], "spreadMethod") == 0) {
                if (strcmp(attr[i + 1], "pad") == 0)
                    grad->spread = NSVG_SPREAD_PAD;
                else if (strcmp(attr[i + 1], "reflect") == 0)
                    grad->spread = NSVG_SPREAD_REFLECT;
                else if (strcmp(attr[i + 1], "repeat") == 0)
                    grad->spread = NSVG_SPREAD_REPEAT;
            } else if (strcmp(attr[i], "xlink:href") == 0) {
                const char *href = attr[i + 1];
                strncpy(grad->ref, href + 1, 62);
                grad->ref[62] = '\0';
            }
        }
    }

    grad->next   = p->gradients;
    p->gradients = grad;
}

static void nsvg__parseGradientStop(NSVGparser *p, const char **attr) {
    NSVGattrib       *curAttr = nsvg__getAttr(p);
    NSVGgradientData *grad;
    NSVGgradientStop *stop;
    int               i, idx;

    curAttr->stopOffset  = 0;
    curAttr->stopColor   = 0;
    curAttr->stopOpacity = 1.0f;

    for (i = 0; attr[i]; i += 2) {
        nsvg__parseAttr(p, attr[i], attr[i + 1]);
    }

    // Add stop to the last gradient.
    grad = p->gradients;
    if (grad == NULL)
        return;

    grad->nstops++;
    grad->stops = (NSVGgradientStop *)realloc(grad->stops, sizeof(NSVGgradientStop) * grad->nstops);
    if (grad->stops == NULL)
        return;

    // Insert
    idx = grad->nstops - 1;
    for (i = 0; i < grad->nstops - 1; i++) {
        if (curAttr->stopOffset < grad->stops[i].offset) {
            idx = i;
            break;
        }
    }
    if (idx != grad->nstops - 1) {
        for (i = grad->nstops - 1; i > idx; i--)
            grad->stops[i] = grad->stops[i - 1];
    }

    stop        = &grad->stops[idx];
    stop->color = curAttr->stopColor;
    stop->color |= (unsigned int)(curAttr->stopOpacity * 255) << 24;
    stop->offset = curAttr->stopOffset;
}

static void nsvg__startElement(void *ud, const char *el, const char **attr) {
    NSVGparser *p = (NSVGparser *)ud;

    if (p->defsFlag) {
        // Skip everything but gradients in defs
        if (strcmp(el, "linearGradient") == 0) {
            nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT);
        } else if (strcmp(el, "radialGradient") == 0) {
            nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT);
        } else if (strcmp(el, "stop") == 0) {
            nsvg__parseGradientStop(p, attr);
        }
        return;
    }

    if (strcmp(el, "g") == 0) {
        nsvg__pushAttr(p);
        nsvg__parseAttribs(p, attr);
    } else if (strcmp(el, "path") == 0) {
        if (p->pathFlag) // Do not allow nested paths.
            return;
        nsvg__pushAttr(p);
        nsvg__parsePath(p, attr);
        nsvg__popAttr(p);
    } else if (strcmp(el, "rect") == 0) {
        nsvg__pushAttr(p);
        nsvg__parseRect(p, attr);
        nsvg__popAttr(p);
    } else if (strcmp(el, "circle") == 0) {
        nsvg__pushAttr(p);
        nsvg__parseCircle(p, attr);
        nsvg__popAttr(p);
    } else if (strcmp(el, "ellipse") == 0) {
        nsvg__pushAttr(p);
        nsvg__parseEllipse(p, attr);
        nsvg__popAttr(p);
    } else if (strcmp(el, "line") == 0) {
        nsvg__pushAttr(p);
        nsvg__parseLine(p, attr);
        nsvg__popAttr(p);
    } else if (strcmp(el, "polyline") == 0) {
        nsvg__pushAttr(p);
        nsvg__parsePoly(p, attr, 0);
        nsvg__popAttr(p);
    } else if (strcmp(el, "polygon") == 0) {
        nsvg__pushAttr(p);
        nsvg__parsePoly(p, attr, 1);
        nsvg__popAttr(p);
    } else if (strcmp(el, "linearGradient") == 0) {
        nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT);
    } else if (strcmp(el, "radialGradient") == 0) {
        nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT);
    } else if (strcmp(el, "stop") == 0) {
        nsvg__parseGradientStop(p, attr);
    } else if (strcmp(el, "defs") == 0) {
        p->defsFlag = 1;
    } else if (strcmp(el, "svg") == 0) {
        nsvg__parseSVG(p, attr);
    }
}

static void nsvg__endElement(void *ud, const char *el) {
    NSVGparser *p = (NSVGparser *)ud;

    if (strcmp(el, "g") == 0) {
        nsvg__popAttr(p);
    } else if (strcmp(el, "path") == 0) {
        p->pathFlag = 0;
    } else if (strcmp(el, "defs") == 0) {
        p->defsFlag = 0;
    }
}

static void nsvg__content(void *ud, const char *s) {
    NSVG_NOTUSED(ud);
    NSVG_NOTUSED(s);
    // empty
}

static void nsvg__imageBounds(NSVGparser *p, float *bounds) {
    NSVGshape *shape;
    shape = p->image->shapes;
    if (shape == NULL) {
        bounds[0] = bounds[1] = bounds[2] = bounds[3] = 0.0;
        return;
    }
    bounds[0] = shape->bounds[0];
    bounds[1] = shape->bounds[1];
    bounds[2] = shape->bounds[2];
    bounds[3] = shape->bounds[3];
    for (shape = shape->next; shape != NULL; shape = shape->next) {
        bounds[0] = nsvg__minf(bounds[0], shape->bounds[0]);
        bounds[1] = nsvg__minf(bounds[1], shape->bounds[1]);
        bounds[2] = nsvg__maxf(bounds[2], shape->bounds[2]);
        bounds[3] = nsvg__maxf(bounds[3], shape->bounds[3]);
    }
}

static float nsvg__viewAlign(float content, float container, int type) {
    if (type == NSVG_ALIGN_MIN)
        return 0;
    else if (type == NSVG_ALIGN_MAX)
        return container - content;
    // mid
    return (container - content) * 0.5f;
}

static void nsvg__scaleGradient(NSVGgradient *grad, float tx, float ty, float sx, float sy) {
    float t[6];
    nsvg__xformSetTranslation(t, tx, ty);
    nsvg__xformMultiply(grad->xform, t);

    nsvg__xformSetScale(t, sx, sy);
    nsvg__xformMultiply(grad->xform, t);
}

static void nsvg__scaleToViewbox(NSVGparser *p, const char *units) {
    NSVGshape *shape;
    NSVGpath  *path;
    float      tx, ty, sx, sy, us, bounds[4], t[6], avgs;
    int        i;
    float     *pt;

    // Guess image size if not set completely.
    nsvg__imageBounds(p, bounds);

    if (p->viewWidth == 0) {
        if (p->image->width > 0) {
            p->viewWidth = p->image->width;
        } else {
            p->viewMinx  = bounds[0];
            p->viewWidth = bounds[2] - bounds[0];
        }
    }
    if (p->viewHeight == 0) {
        if (p->image->height > 0) {
            p->viewHeight = p->image->height;
        } else {
            p->viewMiny   = bounds[1];
            p->viewHeight = bounds[3] - bounds[1];
        }
    }
    if (p->image->width == 0)
        p->image->width = p->viewWidth;
    if (p->image->height == 0)
        p->image->height = p->viewHeight;

    tx = -p->viewMinx;
    ty = -p->viewMiny;
    sx = p->viewWidth > 0 ? p->image->width / p->viewWidth : 0;
    sy = p->viewHeight > 0 ? p->image->height / p->viewHeight : 0;
    // Unit scaling
    us = 1.0f / nsvg__convertToPixels(p, nsvg__coord(1.0f, nsvg__parseUnits(units)), 0.0f, 1.0f);

    // Fix aspect ratio
    if (p->alignType == NSVG_ALIGN_MEET) {
        // fit whole image into viewbox
        sx = sy = nsvg__minf(sx, sy);
        tx += nsvg__viewAlign(p->viewWidth * sx, p->image->width, p->alignX) / sx;
        ty += nsvg__viewAlign(p->viewHeight * sy, p->image->height, p->alignY) / sy;
    } else if (p->alignType == NSVG_ALIGN_SLICE) {
        // fill whole viewbox with image
        sx = sy = nsvg__maxf(sx, sy);
        tx += nsvg__viewAlign(p->viewWidth * sx, p->image->width, p->alignX) / sx;
        ty += nsvg__viewAlign(p->viewHeight * sy, p->image->height, p->alignY) / sy;
    }

    // Transform
    sx *= us;
    sy *= us;
    avgs = (sx + sy) / 2.0f;
    for (shape = p->image->shapes; shape != NULL; shape = shape->next) {
        shape->bounds[0] = (shape->bounds[0] + tx) * sx;
        shape->bounds[1] = (shape->bounds[1] + ty) * sy;
        shape->bounds[2] = (shape->bounds[2] + tx) * sx;
        shape->bounds[3] = (shape->bounds[3] + ty) * sy;
        for (path = shape->paths; path != NULL; path = path->next) {
            path->bounds[0] = (path->bounds[0] + tx) * sx;
            path->bounds[1] = (path->bounds[1] + ty) * sy;
            path->bounds[2] = (path->bounds[2] + tx) * sx;
            path->bounds[3] = (path->bounds[3] + ty) * sy;
            for (i = 0; i < path->npts; i++) {
                pt    = &path->pts[i * 2];
                pt[0] = (pt[0] + tx) * sx;
                pt[1] = (pt[1] + ty) * sy;
            }
        }

        if (shape->fill.type == NSVG_PAINT_LINEAR_GRADIENT || shape->fill.type == NSVG_PAINT_RADIAL_GRADIENT) {
            nsvg__scaleGradient(shape->fill.gradient, tx, ty, sx, sy);
            memcpy(t, shape->fill.gradient->xform, sizeof(float) * 6);
            nsvg__xformInverse(shape->fill.gradient->xform, t);
        }
        if (shape->stroke.type == NSVG_PAINT_LINEAR_GRADIENT || shape->stroke.type == NSVG_PAINT_RADIAL_GRADIENT) {
            nsvg__scaleGradient(shape->stroke.gradient, tx, ty, sx, sy);
            memcpy(t, shape->stroke.gradient->xform, sizeof(float) * 6);
            nsvg__xformInverse(shape->stroke.gradient->xform, t);
        }

        shape->strokeWidth *= avgs;
        shape->strokeDashOffset *= avgs;
        for (i = 0; i < shape->strokeDashCount; i++)
            shape->strokeDashArray[i] *= avgs;
    }
}

NSVGimage *nsvgParse(char *input, const char *units, float dpi) {
    NSVGparser *p;
    NSVGimage  *ret = 0;

    p = nsvg__createParser();
    if (p == NULL) {
        return NULL;
    }
    p->dpi = dpi;

    nsvg__parseXML(input, nsvg__startElement, nsvg__endElement, nsvg__content, p);

    // Scale to viewBox
    nsvg__scaleToViewbox(p, units);

    ret      = p->image;
    p->image = NULL;

    nsvg__deleteParser(p);

    return ret;
}

NSVGimage *nsvgParseFromFile(const char *filename, const char *units, float dpi) {
    FILE      *fp = NULL;
    size_t     size;
    char      *data  = NULL;
    NSVGimage *image = NULL;

    fp = fopen(filename, "rb");
    if (!fp)
        goto error;
    fseek(fp, 0, SEEK_END);
    size = ftell(fp);
    fseek(fp, 0, SEEK_SET);
    data = (char *)malloc(size + 1);
    if (data == NULL)
        goto error;
    if (fread(data, 1, size, fp) != size)
        goto error;
    data[size] = '\0'; // Must be null terminated.
    fclose(fp);
    image = nsvgParse(data, units, dpi);
    free(data);

    return image;

error:
    if (fp)
        fclose(fp);
    if (data)
        free(data);
    if (image)
        nsvgDelete(image);
    return NULL;
}

void nsvgDelete(NSVGimage *image) {
    NSVGshape *snext, *shape;
    if (image == NULL)
        return;
    shape = image->shapes;
    while (shape != NULL) {
        snext = shape->next;
        nsvg__deletePaths(shape->paths);
        nsvg__deletePaint(&shape->fill);
        nsvg__deletePaint(&shape->stroke);
        free(shape);
        shape = snext;
    }
    free(image);
}

#endif
